{"product_id":"6830-4090-392-6-4-small-block-mopar-hemi-gen-iii-fx-series-1-5cc-flat-top-gen-iii-hemi-forged-piston-set-4-090-inch-bore-pin-dia-0-945-comp-height-1-21","title":"DSS Racing FX Series Gen III Hemi Forged Piston Set 4.090\" Bore: Fits most Hemi Models","description":"\u003ch3\u003eDSS Racing FX Series Gen III Hemi Forged Piston Set\u003c\/h3\u003e\u003cp\u003eFits Most Chrysler \/ Dodge \/ Jeep \/ Ram 6.4L 392 Models\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e1-6830-4090 \/ 2-6830-4090 \/ 3-6830-4090 \/ K1-6830-4090 \/ K2-6830-4090 \/ K3-6830-4090\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe DSS Racing FX Series Gen III Hemi Forged Piston Set is engineered specifically for the Chrysler, Dodge, Jeep, and Ram 6.4L 392 engines. Designed to replace factory pistons, this set offers enhanced durability and performance for enthusiasts seeking reliable power gains and long-lasting engine integrity. Whether you're building a high-performance street machine or a track-ready build, these forged pistons provide the strength and precision needed to handle increased cylinder pressures and elevated RPMs.\u003c\/p\u003e\u003cp\u003eFeaturing a 4.090\" bore size and a compact 1.21\" compression height, these pistons are optimized for the Gen III Hemi small block architecture. Their flat-top design with a -1.5cc dish volume allows for fine-tuning compression ratios to suit various combustion chamber sizes and fuel types, making them versatile for multiple performance applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThese DSS Racing forged pistons incorporate advanced engineering to deliver superior performance and reliability:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCompatible with Chrysler \/ Dodge \/ Jeep \/ Ram 6.4L 392 Gen III Hemi engines\u003c\/li\u003e\n\u003cli\u003e4.090\" bore diameter for precise fitment in factory cylinders\u003c\/li\u003e\n\u003cli\u003eForged construction for enhanced strength and resistance to detonation\u003c\/li\u003e\n\u003cli\u003eFlat-top piston design with -1.5cc dish for optimized combustion\u003c\/li\u003e\n\u003cli\u003eCompression height of 1.21\" tailored for Gen III small block Hemi architecture\u003c\/li\u003e\n\u003cli\u003e.945\" wrist pin diameter with options for full-floating or press-fit installation\u003c\/li\u003e\n\u003cli\u003eRing groove dimensions of 1.2mm \/ 1.2mm \/ 3mm for reliable ring sealing\u003c\/li\u003e\n\u003cli\u003eStroke compatibility of 3.720\" and connecting rod length of 6.2\" for balanced piston-to-rod geometry\u003c\/li\u003e\n\u003cli\u003eAvailable in multiple dish volumes to achieve approximate compression ratios of 11.6:1 (65cc), 10.47:1 (74cc), and 9.38:1 (85cc)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eEach piston in the DSS Racing FX Series is crafted from high-grade forged aluminum alloy, delivering exceptional strength-to-weight ratio and thermal conductivity. The forging process refines the grain structure of the metal, resulting in pistons that withstand the rigors of high-performance combustion environments without compromising durability.\u003c\/p\u003e\u003cp\u003eThe pistons feature precision-machined ring grooves and skirt profiles to minimize friction and wear, while the flat-top design promotes efficient combustion and consistent power delivery. The wrist pin bore is engineered for either full-floating or press-fit configurations, allowing builders to select the optimal setup for their application.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis piston set is designed as a direct replacement for most Chrysler, Dodge, Jeep, and Ram 6.4L 392 Gen III Hemi engines with a 4.090\" bore. Installation requires standard engine assembly procedures and may involve balancing and blueprinting for optimal performance. No major modifications to the block or connecting rods are typically necessary, but professional installation is recommended to ensure proper clearances and ring end gaps.\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 compatible with full-floating or press-fit installation\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\u003eThis piston set is ideal for performance enthusiasts and engine builders upgrading or rebuilding Chrysler, Dodge, Jeep, or Ram 6.4L 392 engines. It suits applications ranging from street performance to drag racing and road course use where increased durability and compression tuning are required. The versatility in compression ratios makes it suitable for various fuel types and forced induction setups.\u003c\/p\u003e","brand":"DSS Racing","offers":[{"title":"FX-1 4032 Alloy \/ Pistons - Pins and Locs Without Rings","offer_id":47381019099348,"sku":"1-6830-4090","price":689.95,"currency_code":"USD","in_stock":true},{"title":"FX-2 2618 Alloy \/ Pistons - Pins and Locs Without Rings","offer_id":47381019132116,"sku":"2-6830-4090","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":47381019164884,"sku":"3-6830-4090","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":47381019197652,"sku":"K1-6830-4090","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":47381019230420,"sku":"K2-6830-4090","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":47381019263188,"sku":"K3-6830-4090","price":1087.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/0002053_4_7acf7aed-0c3f-4eb8-9b5a-0ad16b2125b7.webp?v=1771666996","url":"https:\/\/fasthemis.com\/products\/6830-4090-392-6-4-small-block-mopar-hemi-gen-iii-fx-series-1-5cc-flat-top-gen-iii-hemi-forged-piston-set-4-090-inch-bore-pin-dia-0-945-comp-height-1-21","provider":"FastHemis","version":"1.0","type":"link"}