{"product_id":"6820-4085-6-1-small-block-mopar-hemi-gen-iii-fx-series-1-5cc-flat-top-gen-iii-hemi-forged-piston-set-4-085-inch-bore-pin-dia-0-984-comp-height-1-21","title":"DSS Racing Gen III Hemi FX Series Forged Piston Set 4.085\" Bore: Fits most Hemi Models","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\u003e1-6820-4085 \/ 2-6820-4085 \/ 3-6820-4085 \/ K1-6820-4085 \/ K2-6820-4085 \/ K3-6820-4085\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 replace factory pistons with a high-performance upgrade, these forged pistons offer enhanced strength, durability, and reliability under demanding conditions. Ideal for enthusiasts and racers looking to maximize engine efficiency and longevity, this piston set supports aggressive tuning and high RPM operation while maintaining excellent combustion characteristics.\u003c\/p\u003e\u003cp\u003eWith a 4.085\" bore size and a compact design, these pistons fit most 6.1L SRT8 applications, providing a direct replacement that improves upon stock components. Whether you are rebuilding your engine or upgrading for performance gains, DSS Racing’s FX Series pistons deliver consistent quality and precision engineering.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThese pistons incorporate advanced design elements and materials to meet the rigorous demands of high-performance Mopar engines:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eForged construction for superior strength and resistance to cracking\u003c\/li\u003e\n\u003cli\u003eFlat top design with a -1.5cc dish for optimized combustion chamber volume\u003c\/li\u003e\n\u003cli\u003eCompact height of 1.21\" for compatibility with Gen III Hemi 6.1L engines\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\u003ePin diameter of .984\" with options for full-floating or press-fit configurations\u003c\/li\u003e\n\u003cli\u003eStroke compatibility of 3.578\" and connecting rod length of 6.243\" for precise engine geometry\u003c\/li\u003e\n\u003cli\u003eAvailable compression ratios approximately ranging from 9.04 to 11.17 depending on combustion chamber volume (65cc, 74cc, 85cc)\u003c\/li\u003e\n\u003cli\u003eDesigned specifically for the 375 Small Block Mopar Hemi Gen III platform\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eDSS Racing FX Series pistons are crafted from high-grade forged aluminum alloy, providing an excellent balance of lightweight properties and exceptional strength. The forging process refines the grain structure of the metal, resulting in pistons that withstand extreme thermal and mechanical stresses common in high-performance and racing environments.\u003c\/p\u003e\u003cp\u003eThe pistons feature a flat top design with a slight dish volume to optimize the compression ratio and combustion efficiency. Precision machining ensures tight tolerances for bore fitment and ring groove dimensions, contributing to reduced friction and improved sealing. The option for full-floating or press-fit wrist pins allows customization based on engine build preferences and durability requirements.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis piston set is designed as a direct fit for most Chrysler, Dodge, Jeep, and Ram 6.1L SRT8 engines utilizing the Gen III Hemi platform. Installation requires standard engine rebuild procedures, including proper honing of cylinder bores and ring installation. Depending on the wrist pin choice, either full-floating or press-fit installation techniques should be followed to ensure optimal performance and longevity.\u003c\/p\u003e\u003cp\u003eDue to the precise dimensions and compatibility with stock components, these pistons typically require no additional modifications, making them an excellent upgrade for both rebuilds and performance enhancements.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSet of forged pistons sized for 4.085\" bore\u003c\/li\u003e\n\u003cli\u003eWrist pins (.984\") with options for full-floating or press-fit\u003c\/li\u003e\n\u003cli\u003ePiston rings compatible with 1.2\/1.2\/3mm groove sizes (rings 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\u003cp\u003eThis piston set is ideal for performance enthusiasts, engine builders, and racers who demand reliable, high-strength components for their 6.1L SRT8 Mopar engines. Whether building a street performance engine, a track-focused race motor, or a durable daily driver with increased power output, these forged pistons provide the durability and precision needed to handle elevated boost, higher RPMs, and aggressive tuning.\u003c\/p\u003e","brand":"DSS Racing","offers":[{"title":"FX-1 4032 Alloy \/ Pistons - Pins and Locs Without Rings","offer_id":47381021393108,"sku":"1-6820-4085","price":689.95,"currency_code":"USD","in_stock":true},{"title":"FX-2 2618 Alloy \/ Pistons - Pins and Locs Without Rings","offer_id":47381021425876,"sku":"2-6820-4085","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":47381021458644,"sku":"3-6820-4085","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":47381021491412,"sku":"K1-6820-4085","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":47381021524180,"sku":"K2-6820-4085","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":47381021556948,"sku":"K3-6820-4085","price":1087.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/0002044_4_7ed2be77-1e9b-4b9f-b081-ddc5896beb11.webp?v=1771666993","url":"https:\/\/fasthemis.com\/products\/6820-4085-6-1-small-block-mopar-hemi-gen-iii-fx-series-1-5cc-flat-top-gen-iii-hemi-forged-piston-set-4-085-inch-bore-pin-dia-0-984-comp-height-1-21","provider":"FastHemis","version":"1.0","type":"link"}