{"product_id":"6840-4090-6-1-stroker-small-block-mopar-hemi-gen-iii-fx-series-1-5cc-flat-top-gen-iii-hemi-forged-piston-set-4-090-inch-bore-pin-dia-0-927-comp-height-1-21","title":"DSS Racing Gen III FX Series Forged Piston Set 4.090\" Bore: Fits Dodge \/ Chrysler \/ Jeep (05-10)","description":"\u003ch3\u003eDSS Racing Gen III 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\u003e1-6840-4090 \/ 2-6840-4090 \/ 3-6840-4090 \/ K1-6840-4090 \/ K2-6840-4090 \/ K3-6840-4090\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe DSS Racing Gen III 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, this set offers enhanced strength and durability for high-performance applications. Whether you are building a street performance engine or a track-ready powerplant, these pistons provide the reliability and precision needed to handle increased horsepower and boost levels.\u003c\/p\u003e\u003cp\u003eThese forged pistons are ideal for enthusiasts and professional builders seeking to improve engine longevity while maintaining factory-like dimensions and clearances. Their compatibility with the 376 Small Block Mopar Hemi Gen III platform ensures a direct fit with minimal modifications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eBuilt with advanced forging technology and engineered for optimal performance, the DSS Racing Gen III FX Series pistons deliver a range of benefits:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCompatible with 4.090\" bore applications on most Chrysler, Dodge, Jeep, and Ram 6.1L SRT8 engines\u003c\/li\u003e\n\u003cli\u003eForged construction for superior strength and resistance to detonation\u003c\/li\u003e\n\u003cli\u003eFlat top design with a -1.5cc dish for precise combustion chamber volume control\u003c\/li\u003e\n\u003cli\u003eCompression height of 1.21\" to maintain proper deck clearance and piston-to-valve clearance\u003c\/li\u003e\n\u003cli\u003e.927\" wrist pin diameter with options for full-floating or press-fit configurations\u003c\/li\u003e\n\u003cli\u003eRing groove dimensions of 1.2mm top and second rings, and 3mm oil ring for effective sealing and oil control\u003c\/li\u003e\n\u003cli\u003eDesigned to work with a 3.578\" stroke and 6.243\" connecting rods for balanced performance\u003c\/li\u003e\n\u003cli\u003eAvailable in multiple combustion chamber volume options (65cc, 74cc, 85cc) to tailor compression ratios from approximately 9.06:1 to 11.2:1\u003c\/li\u003e\n\u003cli\u003ePrecision machining ensures consistent fitment and performance across all pistons in the set\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe DSS Racing Gen III FX Series pistons are crafted from high-quality forged aluminum alloy, providing an excellent strength-to-weight ratio. The forging process enhances the grain structure of the metal, resulting in pistons that can withstand the rigors of high cylinder pressures and temperatures common in performance engines.\u003c\/p\u003e\u003cp\u003eThe flat top piston design with a slight dish (-1.5cc) optimizes combustion efficiency and helps control compression ratios for various tuning needs. The pistons feature carefully engineered ring grooves and wrist pin bores to ensure durability and reduce friction. Options for full-floating or press-fit wrist pins allow builders to customize installation based on engine requirements.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis piston set is designed for direct fitment in most Chrysler, Dodge, Jeep, and Ram 6.1L SRT8 engines using a 4.090\" bore. The pistons maintain factory dimensions for compression height and wrist pin size, simplifying installation and minimizing the need for additional machining or modifications. Proper ring end gap and clearance checks are recommended during assembly to ensure optimal performance and longevity.\u003c\/p\u003e\u003cp\u003eWhether upgrading a stock rebuild or assembling a high-performance engine, these pistons provide a reliable foundation for increased power and durability.\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 4.090\" bore\u003c\/li\u003e\n\u003cli\u003eWrist pins (.927\") with options for full-floating or press-fit installation\u003c\/li\u003e\n\u003cli\u003ePrecision-machined ring grooves compatible with 1.2mm top and second rings, and 3mm oil rings\u003c\/li\u003e\n\u003cli\u003eComprehensive documentation for installation and specifications\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis piston set is perfect for engine builders, performance enthusiasts, and professional shops upgrading or rebuilding 6.1L SRT8 engines. It suits applications ranging from street performance to track use, where enhanced strength, reliability, and precise combustion control are critical. The multiple combustion chamber volume options allow tuning for various compression ratios to match fuel types and power goals.\u003c\/p\u003e","brand":"DSS Racing","offers":[{"title":"FX-1 4032 Alloy \/ Pistons - Pins and Locs Without Rings","offer_id":47381014085844,"sku":"1-6840-4090","price":689.95,"currency_code":"USD","in_stock":true},{"title":"FX-2 2618 Alloy \/ Pistons - Pins and Locs Without Rings","offer_id":47381014118612,"sku":"2-6840-4090","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":47381014151380,"sku":"3-6840-4090","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":47381014184148,"sku":"K1-6840-4090","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":47381014216916,"sku":"K2-6840-4090","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":47381014249684,"sku":"K3-6840-4090","price":1087.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/0002074_4_065313e6-2180-4182-817e-b823b1c4ea40.webp?v=1771667007","url":"https:\/\/fasthemis.com\/products\/6840-4090-6-1-stroker-small-block-mopar-hemi-gen-iii-fx-series-1-5cc-flat-top-gen-iii-hemi-forged-piston-set-4-090-inch-bore-pin-dia-0-927-comp-height-1-21","provider":"FastHemis","version":"1.0","type":"link"}