{"product_id":"s-s-m8-136-big-bore-cylinder-piston-kit-clear-fins","title":"S\u0026S, M8 136\" big bore cylinder \u0026 piston kit. Clear fins","description":"2222cc kit. Black powder coated wrinkle finish cylinders with clear (highlighted) fins. Kit includes a forged 4.320\" big bore piston kit; black wrinkle 4.320\" big bore cylinders; 2 multi-Layer-Steel .030\" head gaskets; 2 cylinder base gaskets; 4 cylinder dowels; 2 exhaust gaskets and a S\u0026amp;S cubic inch cam cover batch. Works with stock crankcases; case boring is not required. 4-5\/8\" stroker flywheels are required; these must be purchased separately as 923271. Note: S\u0026amp;S measured 150.5HP and 147.5TQ with a 590 cam; CNC heads; Big Bore throttle body and a high flow Stealth air cleaner kit.Note: Fully assembled 4-5\/8\" stroke stroker flywheel assemblies are required for installation of this big bore kit. Available as 923271 (without balancer gear). Comes with full width wrist pin connecting rods; which is required for S\u0026amp;S pistons. Note: S\u0026amp;S 576972 extra strong head bolt kit or similar is advised. Note: Tuning of fuel injection and ignition is required. Note: S\u0026amp;S does not advise this kit for use on any Tri-Glide or other three wheelers; including conversions; due to the lugging nature of these bikes.\u003cp\u003e\u003cstrong\u003eFitment:\u003c\/strong\u003e 17-25 M8 models (excl. 2025 Softail; 23-25 CVO; 24-25 FLTRX; 24-25 FLHX; 2025 FLHXU; all Trikes) (NU)\u003c\/p\u003e","brand":"S\u0026S","offers":[{"title":"Default Title","offer_id":54307617472839,"sku":"994437","price":2009.05,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0987\/7812\/0519\/files\/994437k.jpg?v=1784466427","url":"https:\/\/www.chopperessentials.com\/products\/s-s-m8-136-big-bore-cylinder-piston-kit-clear-fins","provider":"Chopper Essentials Co.","version":"1.0","type":"link"}