{"product_id":"6840-4085-392-6-4-small-block-mopar-hemi-gen-iii-fx-series-1-5cc-flat-top-gen-iii-hemi-forged-piston-set-4-085-inch-bore-pin-dia-0-927-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 Gen III Hemi FX Series Forged Piston Set\u003c\/h3\u003e\u003cp\u003eFits Most Chrysler \/ Dodge \/ Jeep \/ Ram 6.4L 392 Models\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e1-6840-4085C \/ 2-6840-4085C \/ 3-6840-4085C \/ K1-6840-4085C \/ K2-6840-4085C \/ K3-6840-4085C\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 Chrysler, Dodge, Jeep, and Ram 6.4L 392 engines. Designed to meet the demands of high-performance applications, these pistons provide enhanced strength, durability, and reliability for enthusiasts and professional builders alike. Whether you are upgrading your engine for street performance, racing, or heavy-duty use, this piston set offers a precision fit and superior construction to maximize your engine’s potential.\u003c\/p\u003e\u003cp\u003eThese pistons are forged to exacting standards, ensuring consistent quality and performance. They are ideal for those seeking to improve engine efficiency, withstand higher cylinder pressures, and maintain optimal compression ratios without sacrificing reliability.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eBuilt for performance and durability, the DSS Racing Gen III Hemi FX Series pistons include the following key features:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCompatible with 4.085\" bore size, fitting most Chrysler \/ Dodge \/ Jeep \/ Ram 6.4L 392 engines\u003c\/li\u003e\n\u003cli\u003eForged construction for superior strength and resistance to wear\u003c\/li\u003e\n\u003cli\u003eComp height of 1.21\" with a -1.5cc flat top design for optimized combustion\u003c\/li\u003e\n\u003cli\u003e.927\" wrist pin diameter available in full-floating or press-fit options\u003c\/li\u003e\n\u003cli\u003ePrecision ring grooves sized at 1.2mm \/ 1.2mm \/ 3mm for reliable ring sealing\u003c\/li\u003e\n\u003cli\u003eDesigned for a 3.720\" stroke and 6.2\" connecting rods, matching factory specifications\u003c\/li\u003e\n\u003cli\u003eAvailable in multiple combustion chamber volumes (65cc, 74cc, 85cc) to tailor compression ratios\u003c\/li\u003e\n\u003cli\u003eApproximate compression ratios ranging from 9.36:1 to 11.57:1 depending on chamber volume\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe DSS Racing FX Series pistons are crafted from high-grade forged aluminum alloy, delivering an optimal balance of lightweight design and exceptional strength. The forging process enhances the grain structure of the metal, resulting in pistons that can endure the extreme pressures and temperatures found in high-performance Hemi engines.\u003c\/p\u003e\u003cp\u003eThe flat-top piston design with a slight dish (-1.5cc) promotes efficient combustion and helps control detonation under boost or high compression conditions. The pistons feature precision-machined ring grooves and wrist pin bores to ensure tight tolerances and long-lasting performance. Options for full-floating or press-fit wrist pins allow builders to customize installation based on their specific engine setup and performance goals.\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 6.4L 392 Hemi engines with a 4.085\" bore. Installation requires standard engine rebuilding procedures and may necessitate professional machining to ensure proper clearances and fitment. The pistons are compatible with factory stroke and rod lengths, making them a direct replacement or upgrade for stock components.\u003c\/p\u003e\u003cp\u003eBuilders should verify compatibility with their specific engine block and consider ring package and wrist pin options during assembly. Proper installation and break-in procedures are essential to maximize piston life and engine performance.\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 per kit selection)\u003c\/li\u003e\n\u003cli\u003eWrist pins (full-floating or press-fit depending on option)\u003c\/li\u003e\n\u003cli\u003ePrecision-machined piston rings (1.2mm top and second rings, 3mm oil ring)\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\u003eThe DSS Racing Gen III Hemi FX Series Forged Piston Set is ideal for performance enthusiasts, engine builders, and racers who demand reliable, high-strength components for their 6.4L 392 Hemi engines. Whether upgrading for increased horsepower, forced induction setups, or extended durability under track conditions, these pistons provide a solid foundation for a high-performance build.\u003c\/p\u003e","brand":"DSS Racing","offers":[{"title":"FX-1 4032 Alloy \/ Pistons - Pins and Locs Without Rings","offer_id":47381014872276,"sku":"1-6840-4085C","price":689.95,"currency_code":"USD","in_stock":true},{"title":"FX-2 2618 Alloy \/ Pistons - Pins and Locs Without Rings","offer_id":47381014905044,"sku":"2-6840-4085C","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":47381014937812,"sku":"3-6840-4085C","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":47381014970580,"sku":"K1-6840-4085C","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":47381015003348,"sku":"K2-6840-4085C","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":47381015036116,"sku":"K3-6840-4085C","price":1087.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/0002071_4_af042b97-4c2e-4e3f-9573-66e00da5393d.webp?v=1771667004","url":"https:\/\/fasthemis.com\/products\/6840-4085-392-6-4-small-block-mopar-hemi-gen-iii-fx-series-1-5cc-flat-top-gen-iii-hemi-forged-piston-set-4-085-inch-bore-pin-dia-0-927-comp-height-1-21","provider":"FastHemis","version":"1.0","type":"link"}