{"product_id":"6840-4055-6-1-stroker-small-block-mopar-hemi-gen-iii-fx-series-1-5cc-flat-top-gen-iii-hemi-forged-piston-set-4-055-inch-bore-pin-dia-0-927-comp-height-1-21","title":"DSS Racing Gen III Hemi FX Series Forged Piston Set 4.055\" Bore: Fits most 6.1L SRT8","description":"\u003ch3\u003eDSS Racing FX Series Forged Piston Set\u003c\/h3\u003e\u003cp\u003eFits Most Chrysler \/ Dodge \/ Jeep \/ Ram 6.1L SRT8 Models\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e1-6840-4055 \/ 2-6840-4055 \/ 3-6840-4055 \/ K1-6840-4055 \/ K2-6840-4055 \/ K3-6840-4055\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe DSS Racing Gen III Hemi FX Series Forged Piston Set is engineered specifically for the 6.1L SRT8 engines found in Chrysler, Dodge, Jeep, and Ram vehicles. Designed to deliver superior strength and durability, these pistons are ideal for enthusiasts and professional builders seeking to enhance engine reliability and performance under demanding conditions. Whether you're rebuilding your small block Mopar Hemi or upgrading for higher boost and power levels, this piston set offers a precise fit and excellent combustion efficiency.\u003c\/p\u003e\u003cp\u003eWith a 4.055\" bore size and a compact flat-top design, these pistons optimize compression ratios while maintaining compatibility with stock and aftermarket components. The set is tailored to fit the 370 Small Block Mopar Hemi Gen III platform, ensuring seamless integration and dependable operation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThese forged pistons incorporate advanced engineering and materials to meet the rigorous demands of high-performance applications:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCompatible with 6.1L SRT8 engines from Chrysler, Dodge, Jeep, and Ram\u003c\/li\u003e\n\u003cli\u003e4.055\" bore size tailored for most Gen III Hemi builds\u003c\/li\u003e\n\u003cli\u003eFlat-top piston design with -1.5cc volume for optimized combustion\u003c\/li\u003e\n\u003cli\u003eComp height of 1.21\" for precise deck clearance and compression control\u003c\/li\u003e\n\u003cli\u003e.927\" wrist pin diameter with options for full-floating or press-fit pins\u003c\/li\u003e\n\u003cli\u003eRing groove dimensions: 1.2mm top and second rings, 3mm oil ring for effective sealing\u003c\/li\u003e\n\u003cli\u003eCompatible with 3.578\" stroke and 6.243\" connecting rods\u003c\/li\u003e\n\u003cli\u003eAvailable in multiple compression ratio configurations: 65cc (11.05:1), 74cc (9.98:1), and 85cc (8.93:1)\u003c\/li\u003e\n\u003cli\u003ePrecision forged for enhanced strength and fatigue resistance\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eDSS Racing pistons are crafted from high-quality forged aluminum alloy, providing an excellent balance of lightweight construction and exceptional durability. The forging process refines the grain structure of the metal, resulting in pistons that withstand high cylinder pressures and elevated temperatures typical of performance engines.\u003c\/p\u003e\u003cp\u003eThe flat-top design with a slight volume reduction (-1.5cc) enhances combustion efficiency and helps achieve the desired compression ratios without requiring extensive cylinder head modifications. The pistons feature carefully engineered ring grooves to accommodate high-performance piston rings, ensuring optimal sealing and oil control.\u003c\/p\u003e\u003cp\u003ePin options include full-floating or press-fit configurations, allowing builders to select the best setup for their specific application and performance goals. The precise comp height and bore sizing guarantee a reliable fit within the Gen III Hemi block architecture.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis piston set is designed to fit most Chrysler, Dodge, Jeep, and Ram vehicles equipped with the 6.1L SRT8 Gen III Hemi engine. Installation requires standard engine rebuilding procedures, including proper honing of the cylinder bores to 4.055\" and careful measurement of deck clearance and ring end gaps.\u003c\/p\u003e\u003cp\u003eBuilders should verify rod length compatibility (6.243\") and stroke (3.578\") to ensure optimal piston-to-valve clearance and compression ratio. The pistons accommodate both full-floating and press-fit wrist pins, providing flexibility during assembly. No major modifications to the block or heads are typically necessary when using these pistons within their intended applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSet of forged pistons (quantity as required for engine configuration)\u003c\/li\u003e\n\u003cli\u003eWrist pins (.927\" diameter), full-floating or press-fit options\u003c\/li\u003e\n\u003cli\u003ePrecision-machined ring grooves for 1.2\/1.2\/3mm piston rings (rings not included)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis piston set is ideal for performance enthusiasts, engine builders, and racers upgrading or rebuilding 6.1L SRT8 Gen III Hemi engines. It suits applications ranging from street performance to moderate forced induction setups, where enhanced strength and reliable compression are critical. The pistons provide a solid foundation for increasing power output while maintaining engine longevity and efficiency.\u003c\/p\u003e","brand":"DSS Racing","offers":[{"title":"FX-1 4032 Alloy \/ Pistons - Pins and Locs Without Rings","offer_id":47381017231572,"sku":"1-6840-4055","price":689.95,"currency_code":"USD","in_stock":true},{"title":"FX-2 2618 Alloy \/ Pistons - Pins and Locs Without Rings","offer_id":47381017264340,"sku":"2-6840-4055","price":719.95,"currency_code":"USD","in_stock":true},{"title":"FX-3 2618 Alloy with Lateral Gas Ports - XR .225 Wall Pin Upgrade - Spiro Locs \/ Pistons - Pins and Locs Without Rings","offer_id":47381017297108,"sku":"3-6840-4055","price":899.95,"currency_code":"USD","in_stock":true},{"title":"FX-1 4032 Alloy \/ Pistons - Pins - Locs With DSS Racing Rings in a Kit","offer_id":47381017329876,"sku":"K1-6840-4055","price":867.95,"currency_code":"USD","in_stock":true},{"title":"FX-2 2618 Alloy \/ Pistons - Pins - Locs With DSS Racing Rings in a Kit","offer_id":47381017362644,"sku":"K2-6840-4055","price":897.95,"currency_code":"USD","in_stock":true},{"title":"FX-3 2618 Alloy with Lateral Gas Ports - XR .225 Wall Pin Upgrade - Spiro Locs \/ Pistons - Pins - Locs With DSS Racing Rings in a Kit","offer_id":47381017395412,"sku":"K3-6840-4055","price":1087.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/0002062_4_2a882f6b-98bd-4ebc-84bd-2446dc387607.webp?v=1771667000","url":"https:\/\/fasthemis.com\/products\/6840-4055-6-1-stroker-small-block-mopar-hemi-gen-iii-fx-series-1-5cc-flat-top-gen-iii-hemi-forged-piston-set-4-055-inch-bore-pin-dia-0-927-comp-height-1-21","provider":"FastHemis","version":"1.0","type":"link"}