{"title":"Sleeved Blocks","description":"Offering Sleeving installation for all major platforms, performed with our 5-Axis Centroid block machine and 30+ years combined experience in high-performance applications.","products":[{"product_id":"k20-k24-sleeved-block","title":"K20\/K24 Sleeved Block","description":"Transform your Honda K20\/K24 engine into a high-performance powerhouse with our premium Sleeved Block Service. \u003cem\u003e\u003cstrong\u003eCustomer must supply core block. Please read our shipping instructions on the bottom of any of our web pages. \u003c\/strong\u003e\u003c\/em\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eOur meticulous process begins with thorough thermal cleaning, meticulously performed by our expert technicians in multiple phases. This guarantees a pristine foundation for your engine's upgrade.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eWith over 30 years of combined experience in high-performance block sleeving, our team leverages state-of-the-art technology, including our precision 5-Axis Centroid CNC machine, to craft a sleeved block that's second to none. This ensures precision and accuracy throughout the machining process, resulting in a block that's optimized for top-tier performance.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eOur comprehensive service package includes closed deck sleeves, precision machining, expert installation, and a surface finish that's as smooth as it gets. For those seeking the ultimate engine overhaul, we offer additional options such as cylinder boring, a final hone for optimal ring seal, and O-ring services to further enhance performance and durability.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr\u003e","brand":"Perfect Circle Engines","offers":[{"title":"Sleeves \u0026 Install Only","offer_id":42813447045313,"sku":"","price":1199.99,"currency_code":"USD","in_stock":true},{"title":"Bore \u0026 Hone with torque plate","offer_id":42813446750401,"sku":"","price":1449.0,"currency_code":"USD","in_stock":true},{"title":"Bore \u0026 Hone with torque plate \u0026 O-Ring","offer_id":42813446783169,"sku":"","price":1699.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0590\/9656\/3905\/files\/IMG_1620.jpg?v=1693794623"},{"product_id":"b18-sleeved-block","title":"B18 Sleeved Block","description":"Transform your Honda B18\/B16 engine into a high-performance powerhouse with our premium Sleeved Block Service. \u003cem\u003e\u003cstrong\u003eCustomer must supply core block. Please read our shipping instructions on the bottom of any of our web pages. NO B20 Blocks. \u003c\/strong\u003e\u003c\/em\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eOur meticulous process begins with thorough thermal cleaning, meticulously performed by our expert technicians in multiple phases. This guarantees a pristine foundation for your engine's upgrade.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eWith over 30 years of combined experience in high-performance block sleeving, our team leverages state-of-the-art technology, including our precision 5-Axis Centroid CNC machine, to craft a sleeved block that's second to none. This ensures precision and accuracy throughout the machining process, resulting in a block that's optimized for top-tier performance.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eOur comprehensive service package includes closed deck sleeves, precision machining, expert installation, and a surface finish that's as smooth as it gets. For those seeking the ultimate engine overhaul, we offer additional options such as cylinder boring, a final hone for optimal ring seal, and O-ring services to further enhance performance and durability.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr\u003e","brand":"Perfect Circle Engines","offers":[{"title":"Sleeves \u0026 Install Only","offer_id":42813447110849,"sku":null,"price":1199.99,"currency_code":"USD","in_stock":true},{"title":"Bore \u0026 Hone with torque plate","offer_id":42813447143617,"sku":null,"price":1449.0,"currency_code":"USD","in_stock":true},{"title":"Bore \u0026 Hone with torque plate \u0026 O-Ring","offer_id":42813447176385,"sku":null,"price":1699.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0590\/9656\/3905\/files\/IMG_1806.jpg?v=1693794508"},{"product_id":"h22-sleeved-block","title":"H22 Sleeved Block","description":"Transform your Honda H22 engine into a high-performance powerhouse with our premium Sleeved Block Service. \u003cem\u003e\u003cstrong\u003eCustomer must supply core block. Please read our shipping instructions on the bottom of any of our web pages. \u003c\/strong\u003e\u003c\/em\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eOur meticulous process begins with thorough thermal cleaning, meticulously performed by our expert technicians in multiple phases. This guarantees a pristine foundation for your engine's upgrade.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eWith over 30 years of combined experience in high-performance block sleeving, our team leverages state-of-the-art technology, including our precision 5-Axis Centroid CNC machine, to craft a sleeved block that's second to none. This ensures precision and accuracy throughout the machining process, resulting in a block that's optimized for top-tier performance.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eOur comprehensive service package includes closed deck sleeves, precision machining, expert installation, and a surface finish that's as smooth as it gets. For those seeking the ultimate engine overhaul, we offer additional options such as cylinder boring, a final hone for optimal ring seal, and O-ring services to further enhance performance and durability.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr\u003e","brand":"Perfect Circle Engines","offers":[{"title":"Sleeves \u0026 Install Only","offer_id":42813454581953,"sku":null,"price":1399.99,"currency_code":"USD","in_stock":true},{"title":"Bore \u0026 Hone with torque plate","offer_id":42813454614721,"sku":null,"price":1649.0,"currency_code":"USD","in_stock":true},{"title":"Bore \u0026 Hone with torque plate \u0026 O-Ring","offer_id":42813454647489,"sku":null,"price":1999.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0590\/9656\/3905\/files\/IMG_6969.jpg?v=1695004343"},{"product_id":"f20-sleeved-block","title":"F20 Sleeved Block","description":"Transform your Honda S2000 engine into a high-performance powerhouse with our premium Sleeved Block Service. \u003cem\u003e\u003cstrong\u003eCustomer must supply core block. Please read our shipping instructions on the bottom of any of our web pages. \u003c\/strong\u003e\u003c\/em\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eOur meticulous process begins with thorough thermal cleaning, meticulously performed by our expert technicians in multiple phases. This guarantees a pristine foundation for your engine's upgrade.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eWith over 30 years of combined experience in high-performance block sleeving, our team leverages state-of-the-art technology, including our precision 5-Axis Centroid CNC machine, to craft a sleeved block that's second to none. This ensures precision and accuracy throughout the machining process, resulting in a block that's optimized for top-tier performance.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eOur comprehensive service package includes closed deck sleeves, precision machining, expert installation, and a surface finish that's as smooth as it gets. For those seeking the ultimate engine overhaul, we offer additional options such as cylinder boring, a final hone for optimal ring seal, and O-ring services to further enhance performance and durability.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr\u003e","brand":"Perfect Circle Engines","offers":[{"title":"Sleeves \u0026 Install Only","offer_id":42813455663297,"sku":null,"price":1399.0,"currency_code":"USD","in_stock":true},{"title":"Bore \u0026 Hone with torque plate","offer_id":42813455696065,"sku":null,"price":1849.0,"currency_code":"USD","in_stock":true},{"title":"Bore \u0026 Hone with torque plate \u0026 O-Ring","offer_id":42813455728833,"sku":null,"price":2099.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0590\/9656\/3905\/files\/IMG_1619.jpg?v=1693794811"},{"product_id":"4b11t-sleeved-block","title":"4B11T Sleeved Block","description":"Transform your EVO X\/4B11T engine into a high-performance powerhouse with our premium Sleeved Block Service. \u003cem\u003e\u003cstrong\u003eCustomer must supply core block. Please read our shipping instructions on the bottom of any of our web pages. \u003c\/strong\u003e\u003c\/em\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eOur meticulous process begins with thorough thermal cleaning, meticulously performed by our expert technicians in multiple phases. This guarantees a pristine foundation for your engine's upgrade.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eWith over 30 years of combined experience in high-performance block sleeving, our team leverages state-of-the-art technology, including our precision 5-Axis Centroid CNC machine, to craft a sleeved block that's second to none. This ensures precision and accuracy throughout the machining process, resulting in a block that's optimized for top-tier performance.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eOur comprehensive service package includes flange top sleeves, precision machining, expert installation, and a surface finish that's as smooth as it gets. For those seeking the ultimate engine overhaul, we offer additional options such as cylinder boring, a final hone for optimal ring seal, and O-ring services to further enhance performance and durability.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr\u003e","brand":"Perfect Circle Engines","offers":[{"title":"Sleeves \u0026 Install Only","offer_id":42813455827137,"sku":null,"price":1199.0,"currency_code":"USD","in_stock":true},{"title":"Bore \u0026 Hone with torque plate","offer_id":42813455859905,"sku":null,"price":1449.0,"currency_code":"USD","in_stock":true},{"title":"Bore \u0026 Hone with torque plate \u0026 O-Ring","offer_id":42813455892673,"sku":null,"price":1699.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0590\/9656\/3905\/files\/IMG_1691.jpg?v=1693794473"},{"product_id":"ej20-25-sleeved-block","title":"EJ20\/25 Sleeved Block","description":"\u003cp\u003eTransform your Subaru EJ engine into a high-performance powerhouse with our premium Sleeved Block Service. \u003cem\u003e\u003cstrong\u003eCustomer must supply core block. Please read our shipping instructions on the bottom of any of our web pages. \u003c\/strong\u003e\u003c\/em\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eOur meticulous process begins with thorough thermal cleaning, meticulously performed by our expert technicians in multiple phases. This guarantees a pristine foundation for your engine's upgrade.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eWith over 30 years of combined experience in high-performance block sleeving, our team leverages state-of-the-art technology, including our precision 5-Axis Centroid CNC machine, to craft a sleeved block that's second to none. This ensures precision and accuracy throughout the machining process, resulting in a block that's optimized for top-tier performance.\u003c\/p\u003e\n\u003cp\u003eLine Boring and pinning is HIGHLY recommended with sleeve service, this is the only way to correct main bore issues and prevent crankcase shift. \u003c\/p\u003e\n\u003cp\u003eOur comprehensive service package includes flange top sleeves, precision machining, expert installation, and a surface finish that's as smooth as it gets. For those seeking the ultimate engine overhaul, we offer additional options such as cylinder boring, a final hone for optimal ring seal, and O-ring services to further enhance performance and durability.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr\u003e\u003c\/p\u003e","brand":"Perfect Circle Engines","offers":[{"title":"Sleeves \u0026 Install Only","offer_id":42813456285889,"sku":null,"price":1399.0,"currency_code":"USD","in_stock":true},{"title":"Bore \u0026 Hone with torque plate","offer_id":42813456318657,"sku":null,"price":1849.0,"currency_code":"USD","in_stock":true},{"title":"Bore \u0026 Hone with torque plate \u0026 O-Ring","offer_id":42813456351425,"sku":null,"price":2099.0,"currency_code":"USD","in_stock":true},{"title":"Bore \u0026 Hone with torque plate \u0026 O-Ring \u0026 Line bore\/Pinning","offer_id":42813464182977,"sku":"","price":3499.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0590\/9656\/3905\/files\/OIP_4.jpg?v=1693795634"},{"product_id":"sr20-sleeved-block","title":"SR20 Sleeved Block","description":"Transform your SR20 engine into a high-performance powerhouse with our premium Sleeved Block Service. \u003cem\u003e\u003cstrong\u003eCustomer must supply core block. Please read our shipping instructions on the bottom of any of our web pages. \u003c\/strong\u003e\u003c\/em\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eOur meticulous process begins with thorough thermal cleaning, meticulously performed by our expert technicians in multiple phases. This guarantees a pristine foundation for your engine's upgrade.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eWith over 30 years of combined experience in high-performance block sleeving, our team leverages state-of-the-art technology, including our precision 5-Axis Centroid CNC machine, to craft a sleeved block that's second to none. This ensures precision and accuracy throughout the machining process, resulting in a block that's optimized for top-tier performance.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eOur comprehensive service package includes flange top sleeves, precision machining, expert installation, and a surface finish that's as smooth as it gets. For those seeking the ultimate engine overhaul, we offer additional options such as cylinder boring, a final hone for optimal ring seal, and O-ring services to further enhance performance and durability.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr\u003e","brand":"Perfect Circle Engines","offers":[{"title":"Sleeves \u0026 Install Only","offer_id":42813464379585,"sku":null,"price":1399.0,"currency_code":"USD","in_stock":true},{"title":"Bore \u0026 Hone with torque plate","offer_id":42813464412353,"sku":null,"price":1849.0,"currency_code":"USD","in_stock":true},{"title":"Bore \u0026 Hone with torque plate \u0026 O-Ring","offer_id":42813464445121,"sku":null,"price":2099.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0590\/9656\/3905\/files\/13759939-64AA-4F2D-8EA2-621E0C0A4B22.jpg?v=1693795214"},{"product_id":"b58-supra-sleeved-block","title":"B58 Supra Sleeved Block","description":"Transform your B58 Supra engine into a high-performance powerhouse with our premium Sleeved Block Service. \u003cem\u003e\u003cstrong\u003eCustomer must supply core block. Please read our shipping instructions on the bottom of any of our web pages. \u003c\/strong\u003e\u003c\/em\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eOur meticulous process begins with thorough thermal cleaning, meticulously performed by our expert technicians in multiple phases. This guarantees a pristine foundation for your engine's upgrade.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eWith over 30 years of combined experience in high-performance block sleeving, our team leverages state-of-the-art technology, including our precision 5-Axis Centroid CNC machine, to craft a sleeved block that's second to none. This ensures precision and accuracy throughout the machining process, resulting in a block that's optimized for top-tier performance.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eOur comprehensive service package includes flange top sleeves, precision machining, expert installation, and a surface finish that's as smooth as it gets. For those seeking the ultimate engine overhaul, we offer additional options such as cylinder boring, a final hone for optimal ring seal, and O-ring services to further enhance performance and durability.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr\u003e","brand":"Perfect Circle Engines","offers":[{"title":"Sleeves \u0026 Install Only","offer_id":42813466968257,"sku":null,"price":2249.0,"currency_code":"USD","in_stock":true},{"title":"Bore \u0026 Hone with torque plate","offer_id":42813467001025,"sku":null,"price":2899.0,"currency_code":"USD","in_stock":true},{"title":"Bore \u0026 Hone with torque plate \u0026 O-Ring","offer_id":42813467033793,"sku":null,"price":3199.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0590\/9656\/3905\/files\/IMG_2993.jpg?v=1693794567"},{"product_id":"ls-chevy-sleeved-block","title":"LS Chevy Sleeved Block","description":"Transform your Chevy LS engine into a high-performance powerhouse with our premium Sleeved Block Service. \u003cem\u003e\u003cstrong\u003eCustomer must supply core block. Please read our shipping instructions on the bottom of any of our web pages. \u003c\/strong\u003e\u003c\/em\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eOur meticulous process begins with thorough thermal cleaning, meticulously performed by our expert technicians in multiple phases. This guarantees a pristine foundation for your engine's upgrade.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eWith over 30 years of combined experience in high-performance block sleeving, our team leverages state-of-the-art technology, including our precision 5-Axis Centroid CNC machine, to craft a sleeved block that's second to none. This ensures precision and accuracy throughout the machining process, resulting in a block that's optimized for top-tier performance.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eOur comprehensive service package includes Darton flange top sleeves, precision machining, expert installation, and a surface finish that's as smooth as it gets. For those seeking the ultimate engine overhaul, we offer additional options such as cylinder boring, a final hone for optimal ring seal, and O-ring services to further enhance performance and durability.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr\u003e","brand":"Perfect Circle Engines","offers":[{"title":"Sleeves \u0026 Install Only","offer_id":42813467558081,"sku":null,"price":2399.0,"currency_code":"USD","in_stock":true},{"title":"Bore \u0026 Hone with torque plate","offer_id":42813467590849,"sku":null,"price":2999.0,"currency_code":"USD","in_stock":true},{"title":"Bore \u0026 Hone with torque plate \u0026 O-Ring","offer_id":42813467623617,"sku":null,"price":3499.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0590\/9656\/3905\/files\/ChevroletLogo5.jpg?v=1693795572"},{"product_id":"toyota-3urfe-sleeved-block","title":"Toyota 3URFE Sleeved Block","description":"Transform your 3URFE engine into a high-performance powerhouse with our premium Sleeved Block Service. \u003cem\u003e\u003cstrong\u003eCustomer must supply core block. Please read our shipping instructions on the bottom of any of our web pages. \u003c\/strong\u003e\u003c\/em\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eOur meticulous process begins with thorough thermal cleaning, meticulously performed by our expert technicians in multiple phases. This guarantees a pristine foundation for your engine's upgrade.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eWith over 30 years of combined experience in high-performance block sleeving, our team leverages state-of-the-art technology, including our precision 5-Axis Centroid CNC machine, to craft a sleeved block that's second to none. This ensures precision and accuracy throughout the machining process, resulting in a block that's optimized for top-tier performance.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eOur comprehensive service package includes Darton MID sleeves, precision machining, expert installation, and a surface finish that's as smooth as it gets. For those seeking the ultimate engine overhaul, we offer additional options such as cylinder boring, a final hone for optimal ring seal, and O-ring services to further enhance performance and durability.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr\u003e","brand":"Perfect Circle Engines","offers":[{"title":"Sleeves \u0026 Install Only","offer_id":42815117197505,"sku":null,"price":3499.0,"currency_code":"USD","in_stock":true},{"title":"Bore \u0026 Hone with torque plate","offer_id":42815117230273,"sku":null,"price":4299.0,"currency_code":"USD","in_stock":true},{"title":"Bore \u0026 Hone with torque plate \u0026 O-Ring","offer_id":42815117263041,"sku":null,"price":4549.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0590\/9656\/3905\/files\/AF4D933B-8BBF-4154-9FB1-79912D57ED77.jpg?v=1693795331"},{"product_id":"amg-m157-sleeved-block","title":"AMG M157 Sleeved Block","description":"Transform your AMG M157 engine into a high-performance powerhouse with our premium Sleeved Block Service. \u003cem\u003e\u003cstrong\u003eCustomer must supply core block. Please read our shipping instructions on the bottom of any of our web pages. \u003c\/strong\u003e\u003c\/em\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eOur meticulous process begins with thorough thermal cleaning, meticulously performed by our expert technicians in multiple phases. This guarantees a pristine foundation for your engine's upgrade.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eWith over 30 years of combined experience in high-performance block sleeving, our team leverages state-of-the-art technology, including our precision 5-Axis Centroid CNC machine, to craft a sleeved block that's second to none. This ensures precision and accuracy throughout the machining process, resulting in a block that's optimized for top-tier performance.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003eOur comprehensive service package includes Darton MID sleeves, precision machining, expert installation, and a surface finish that's as smooth as it gets. For those seeking the ultimate engine overhaul, we offer additional options such as cylinder boring, a final hone for optimal ring seal, and O-ring services to further enhance performance and durability.\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr\u003e","brand":"Perfect Circle Engines","offers":[{"title":"Sleeves \u0026 Install Only","offer_id":42815117459649,"sku":null,"price":3499.0,"currency_code":"USD","in_stock":true},{"title":"Bore \u0026 Hone with torque plate","offer_id":42815117492417,"sku":null,"price":4299.0,"currency_code":"USD","in_stock":true},{"title":"Bore \u0026 Hone with torque plate \u0026 O-Ring","offer_id":42815117525185,"sku":null,"price":4549.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0590\/9656\/3905\/files\/IMG_0609.jpg?v=1707401787"},{"product_id":"can-am-x3-sleeved-block","title":"Can-Am X3 Sleeved Block","description":"\u003cp\u003e     Our most recent update to our Rotax 900 block sleeving is certainly the most reliable and effective for containing all that added boost. With optional 7\/16\" stud upgrades and O-Ring, this will power you to above 500whp without breaking the bank. $2,179 for a ready-to-assemble block (Supplied Core). Optional add-ons are extra. FREE SHIPPING! 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