{"product_id":"6845-4085-392-6-4-small-block-mopar-hemi-gen-iii-fx-series-18cc-dish-top-gen-iii-hemi-forged-piston-set-4-085-inch-bore-pin-dia-0-927-comp-height-1-21","title":"DSS Racing FX Series Forged Pistons Set 4.085\" Bore: Fits Chrysler \/ Dodge \/ Jeep \/ Ram (11-26)","description":"\u003ch3\u003eDSS Racing FX Series Forged Pistons\u003c\/h3\u003e\u003cp\u003eFits Most Chrysler \/ Dodge \/ Jeep \/ Ram 6.4L 392 Gen III Mopar Hemi\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e1-6845-4085C \/ 2-6845-4085C \/ 3-6845-4085C \/ K1-6845-4085C \/ K2-6845-4085C \/ K3-6845-4085C\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe DSS Racing FX Series Forged Pistons are precision-engineered performance components designed specifically for the 6.4L 392 Gen III Mopar Hemi engines found in many Chrysler, Dodge, Jeep, and Ram models. These pistons deliver exceptional strength and durability, making them an ideal upgrade for enthusiasts seeking to enhance engine reliability and power output under demanding conditions.\u003c\/p\u003e\u003cp\u003eCrafted for both street and track applications, these forged pistons offer improved resistance to heat and stress compared to stock cast pistons. Whether you are building a high-performance street machine or a race-ready engine, the DSS Racing FX Series pistons provide the foundation for consistent, reliable performance.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eDesigned with advanced engineering and quality materials, the DSS Racing FX Series Forged Pistons include the following key features:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCompatible with 4.085\" bore size for 6.4L 392 Gen III Mopar Hemi engines\u003c\/li\u003e\n\u003cli\u003eComp height of 1.21\" for optimal piston-to-head clearance and compression ratio tuning\u003c\/li\u003e\n\u003cli\u003e18cc dish top design to support various combustion chamber volumes and compression ratios\u003c\/li\u003e\n\u003cli\u003e.927\" wrist pin diameter available in full-floating or press-fit configurations\u003c\/li\u003e\n\u003cli\u003ePrecision ring grooves sized at 1.2mm\/1.2mm\/3mm for reliable ring sealing and reduced blow-by\u003c\/li\u003e\n\u003cli\u003eStroke compatibility of 3.720\" and connecting rod length of 6.2\" for balanced piston dynamics\u003c\/li\u003e\n\u003cli\u003eApproximate compression ratios ranging from 8.16 to 9.72 depending on combustion chamber volume (65cc, 74cc, 85cc)\u003c\/li\u003e\n\u003cli\u003eForged construction for superior strength and fatigue resistance under high-performance conditions\u003c\/li\u003e\n\u003cli\u003eEngineered specifically for the 390 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\u003eThe DSS Racing FX Series pistons are forged from high-grade aluminum alloy, providing an excellent strength-to-weight ratio essential for high-revving engines. The forging process enhances the grain structure of the metal, resulting in pistons that resist cracking, scuffing, and thermal distortion.\u003c\/p\u003e\u003cp\u003eThe pistons feature a carefully engineered dish top design with an 18cc volume reduction, allowing for precise control over compression ratios to suit different performance goals. The ring grooves are machined to tight tolerances to ensure optimal ring fitment and sealing, which helps maintain power and reduce oil consumption.\u003c\/p\u003e\u003cp\u003eAvailable with either full-floating or press-fit wrist pins, these pistons offer flexibility for various engine builds and preferences. The combination of a 3.720\" stroke and 6.2\" connecting rod length ensures balanced piston speed and reduced side loading, contributing to engine longevity and smooth operation.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThese DSS Racing FX Series Forged Pistons are designed as direct replacements for the 6.4L 392 Gen III Mopar Hemi engines used in many Chrysler, Dodge, Jeep, and Ram vehicles. Installation requires standard engine rebuild procedures, including proper honing of the cylinder bores to the specified 4.085\" bore size.\u003c\/p\u003e\u003cp\u003eDepending on the wrist pin option chosen (full-floating or press-fit), installation may require specific pin retention methods. It is recommended to have a professional engine builder or experienced technician perform the installation to ensure correct piston ring orientation, torque specifications, and clearances are met for optimal performance and reliability.\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 (.927\") in either full-floating or press-fit configuration\u003c\/li\u003e\n\u003cli\u003ePrecision-machined piston rings sized 1.2mm\/1.2mm\/3mm\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 FX Series Forged Pistons are ideal for performance enthusiasts, engine builders, and racers who demand enhanced durability and power from their 6.4L 392 Gen III Mopar Hemi engines. Whether upgrading a factory engine for increased boost, nitrous, or naturally aspirated power, these pistons provide a reliable foundation for high-performance builds.\u003c\/p\u003e\u003cp\u003eThey are well-suited for street performance, drag racing, road racing, and other motorsport applications where engine strength and consistent compression are critical.\u003c\/p\u003e","brand":"DSS Racing","offers":[{"title":"FX-1 4032 Alloy \/ Pistons - Pins and Locs Without Rings","offer_id":47381009924308,"sku":"1-6845-4085C","price":689.95,"currency_code":"USD","in_stock":true},{"title":"FX-2 2618 Alloy \/ Pistons - Pins and Locs Without Rings","offer_id":47381009957076,"sku":"2-6845-4085C","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":47381009989844,"sku":"3-6845-4085C","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":47381010022612,"sku":"K1-6845-4085C","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":47381010055380,"sku":"K2-6845-4085C","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":47381010088148,"sku":"K3-6845-4085C","price":1087.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/0002092_4_30a15abb-fdd7-420c-b655-94164851cba5.webp?v=1771667012","url":"https:\/\/fasthemis.com\/products\/6845-4085-392-6-4-small-block-mopar-hemi-gen-iii-fx-series-18cc-dish-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"}