{"product_id":"6820-4075-6-1-small-block-mopar-hemi-gen-iii-fx-series-1-5cc-flat-top-gen-iii-hemi-forged-piston-set-4-075-inch-bore-pin-dia-0-984-comp-height-1-21","title":"DSS Racing Gen III Hemi FX Series Forged Piston Set 4.075\" Bore: Fits most Hemi Models","description":"\u003ch3\u003eDSS Racing Gen III Hemi FX Series Forged Piston Set\u003c\/h3\u003e\u003cp\u003eFits Chrysler \/ Dodge \/ Jeep \/ Ram 6.1L SRT8 Models\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e1-6820-4075 \/ 2-6820-4075 \/ 3-6820-4075 \/ K1-6820-4075 \/ K2-6820-4075 \/ K3-6820-4075\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 handle the rigors of high-performance applications, these pistons offer a perfect balance of strength, durability, and precision fitment. Whether you are rebuilding your engine or upgrading for increased power and reliability, this piston set provides a direct replacement solution that meets or exceeds OEM specifications.\u003c\/p\u003e\u003cp\u003eIdeal for enthusiasts and professional builders alike, these pistons are crafted to optimize combustion efficiency and withstand elevated cylinder pressures, making them suitable for street performance, track use, and mild forced induction setups.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eBuilt with advanced engineering and premium materials, the DSS Racing FX Series pistons deliver exceptional performance benefits:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCompatible with 4.075\" bore size for most Chrysler \/ Dodge \/ Jeep \/ Ram 6.1L SRT8 engines\u003c\/li\u003e\n\u003cli\u003eForged construction for superior strength and durability under high stress\u003c\/li\u003e\n\u003cli\u003eFlat top design with a -1.5cc dish to optimize combustion chamber shape\u003c\/li\u003e\n\u003cli\u003eComp height of 1.21\" for precise piston-to-deck clearance\u003c\/li\u003e\n\u003cli\u003ePin diameter of .984\" with options for full-floating or press-fit pins\u003c\/li\u003e\n\u003cli\u003eRing groove dimensions of 1.2mm\/1.2mm\/3mm to accommodate high-performance piston rings\u003c\/li\u003e\n\u003cli\u003eStroke compatibility of 3.578\" and connecting rod length of 6.243\" for accurate engine geometry\u003c\/li\u003e\n\u003cli\u003eAvailable in multiple compression ratios approximately ranging from 9.0:1 to 11.11:1 depending on combustion chamber volume (65cc, 74cc, 85cc)\u003c\/li\u003e\n\u003cli\u003ePrecision machining ensures optimal balance and minimal friction for improved engine efficiency\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eEach piston in the DSS Racing Gen III FX Series set is forged from high-grade aluminum alloy, providing an excellent strength-to-weight ratio essential for high-revving Hemi engines. The forging process enhances grain structure, resulting in pistons that resist cracking, scuffing, and thermal fatigue. The flat top design with a slight dish improves combustion dynamics, helping to maximize power output while maintaining reliable detonation resistance.\u003c\/p\u003e\u003cp\u003eThe pistons feature carefully engineered ring grooves and pin bosses to ensure secure ring seating and wrist pin retention, available in either full-floating or press-fit configurations to suit different engine builds and preferences. This attention to detail supports long-term durability and consistent performance under demanding conditions.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eDesigned as a direct fit replacement for most Chrysler, Dodge, Jeep, and Ram 6.1L SRT8 engines, these pistons simplify the rebuild or upgrade process. Minimal modifications are required when installing, provided the engine block is properly prepared and honed to the specified 4.075\" bore size. The choice between full-floating or press-fit wrist pins allows customization based on builder preference and application requirements.\u003c\/p\u003e\u003cp\u003eProfessional installation is recommended to ensure correct piston ring end gaps, piston deck clearance, and overall engine assembly tolerances are maintained for optimal performance and longevity.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSet of forged pistons for 4.075\" bore size (quantity as per engine requirements)\u003c\/li\u003e\n\u003cli\u003eWrist pins (full-floating or press-fit, depending on selected SKU)\u003c\/li\u003e\n\u003cli\u003ePiston rings compatible with 1.2\/1.2\/3mm groove dimensions (may be sold separately)\u003c\/li\u003e\n\u003cli\u003eInstallation instructions and technical specifications\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eEngine builders upgrading or rebuilding Chrysler \/ Dodge \/ Jeep \/ Ram 6.1L SRT8 engines\u003c\/li\u003e\n\u003cli\u003ePerformance enthusiasts seeking enhanced durability and power potential\u003c\/li\u003e\n\u003cli\u003eStreet and track applications requiring reliable forged pistons\u003c\/li\u003e\n\u003cli\u003eMild forced induction setups where OEM pistons may not provide sufficient strength\u003c\/li\u003e\n\u003cli\u003eAnyone needing a high-quality, precision-engineered piston set for Gen III Hemi engines\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DSS Racing","offers":[{"title":"FX-1 4032 Alloy \/ Pistons - Pins and Locs Without Rings","offer_id":47381021589716,"sku":"1-6820-4075","price":689.95,"currency_code":"USD","in_stock":true},{"title":"FX-2 2618 Alloy \/ Pistons - Pins and Locs Without Rings","offer_id":47381021622484,"sku":"2-6820-4075","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":47381021655252,"sku":"3-6820-4075","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":47381021688020,"sku":"K1-6820-4075","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":47381021720788,"sku":"K2-6820-4075","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":47381021753556,"sku":"K3-6820-4075","price":1087.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/0002043_4_5c0b64ac-25b9-47d2-9d5d-97beb7c9cb8b.webp?v=1771666992","url":"https:\/\/fasthemis.com\/products\/6820-4075-6-1-small-block-mopar-hemi-gen-iii-fx-series-1-5cc-flat-top-gen-iii-hemi-forged-piston-set-4-075-inch-bore-pin-dia-0-984-comp-height-1-21","provider":"FastHemis","version":"1.0","type":"link"}