{"product_id":"6840-4055-392-6-4-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 Hemi Models","description":"\u003ch3\u003eDSS Racing 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\u003e1-6840-4055C \/ 2-6840-4055C \/ 3-6840-4055C \/ K1-6840-4055C \/ K2-6840-4055C \/ K3-6840-4055C\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 for enthusiasts and professional builders seeking durable, high-performance pistons for Chrysler, Dodge, Jeep, and Ram 6.4L 392 engines. Designed to fit most 6.4L 392 small block Mopar Hemi Gen III engines, these pistons offer a perfect balance of strength, precision, and reliability for street, strip, or track applications.\u003c\/p\u003e\u003cp\u003eWith a 4.055\" bore size and a compact 1.21\" compression height, these forged pistons provide excellent compatibility with factory and aftermarket components. Their flat-top design with a -1.5cc volume optimizes combustion efficiency and power output, making them ideal for high-performance builds that demand consistent results under extreme conditions.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThese pistons incorporate advanced engineering and quality materials to deliver superior performance and longevity. Key features include:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eForged construction for enhanced strength and durability under high stress\u003c\/li\u003e\n\u003cli\u003eFlat-top piston design with a -1.5cc volume for optimized combustion chamber dynamics\u003c\/li\u003e\n\u003cli\u003ePin diameter of .927\" compatible with full-floating or press-fit configurations\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 3.720\" and connecting rod length of 6.2\" for precise engine geometry\u003c\/li\u003e\n\u003cli\u003eAvailable in multiple compression volumes (65cc, 74cc, 85cc) to suit various compression ratio requirements\u003c\/li\u003e\n\u003cli\u003eDesigned specifically for the 384 Small Block Mopar Hemi Gen III platform\u003c\/li\u003e\n\u003cli\u003ePrecision manufacturing ensures tight tolerances and consistent fitment\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, providing an optimal combination of lightweight strength and thermal conductivity. This material choice helps reduce reciprocating mass while maintaining the structural integrity needed for high-RPM and high-boost applications. The pistons feature a carefully engineered flat-top profile with a slight dish to fine-tune compression ratios, enhancing combustion efficiency and power delivery.\u003c\/p\u003e\u003cp\u003eEach piston is machined with precision ring grooves and pin bores to ensure proper sealing and minimal friction. The option for full-floating or press-fit wrist pins allows builders to tailor the setup to their specific engine build and performance goals. The robust design supports aggressive tuning and extended durability in demanding environments.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThese pistons are designed to fit most Chrysler, Dodge, Jeep, and Ram 6.4L 392 Hemi Gen III engines with a 4.055\" bore. Installation requires standard engine assembly procedures, and the pistons are compatible with factory or aftermarket rods featuring a 6.2\" length and a 3.720\" stroke. Builders should verify clearances and ring end gaps during installation to ensure optimal performance and longevity.\u003c\/p\u003e\u003cp\u003eNo major modifications are typically necessary, making these pistons a direct replacement or upgrade option for performance rebuilds and engine refreshes.\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\u003eCompatible wrist pins (.927\" diameter)\u003c\/li\u003e\n\u003cli\u003ePrecision-machined ring grooves ready for high-performance piston rings\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePerformance engine builders upgrading 6.4L 392 Hemi Gen III platforms\u003c\/li\u003e\n\u003cli\u003eStreet and strip enthusiasts seeking reliable forged pistons for high horsepower applications\u003c\/li\u003e\n\u003cli\u003eMotorsport participants requiring durable components for drag racing, road racing, or off-road use\u003c\/li\u003e\n\u003cli\u003eEngine rebuilders aiming to improve compression ratios and combustion efficiency\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"DSS Racing","offers":[{"title":"FX-1 4032 Alloy \/ Pistons - Pins and Locs Without Rings","offer_id":47381016510676,"sku":"1-6840-4055C","price":689.95,"currency_code":"USD","in_stock":true},{"title":"FX-2 2618 Alloy \/ Pistons - Pins and Locs Without Rings","offer_id":47381016543444,"sku":"2-6840-4055C","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":47381016576212,"sku":"3-6840-4055C","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":47381016608980,"sku":"K1-6840-4055C","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":47381016641748,"sku":"K2-6840-4055C","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":47381016674516,"sku":"K3-6840-4055C","price":1087.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/0002063_4_a1385b86-30f0-40b6-9be6-1c9f22480975.webp?v=1771667000","url":"https:\/\/fasthemis.com\/products\/6840-4055-392-6-4-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"}