{"product_id":"6850-4125-6-2-small-block-mopar-hemi-gen-iii-fx-series-1-5cc-flat-top-gen-iii-hemi-forged-piston-set-4-125-inch-bore-pin-dia-0-945-comp-height-1-275","title":"DSS Racing FX Series Forged Flat Top Piston Set 4.125\" Bore: Fits most Hemi Models","description":"\u003ch3\u003eDSS Racing FX Series Forged Flat Top Piston Set\u003c\/h3\u003e\u003cp\u003eFits Chrysler \/ Dodge \/ Jeep \/ Ram 6.2L Hellcat \u0026amp; Trackhawk\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e1-6850-4125 \/ 2-6850-4125 \/ 3-6850-4125 \/ K1-6850-4125 \/ K2-6850-4125 \/ K3-6850-4125\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe DSS Racing FX Series Forged Flat Top Piston Set is engineered specifically for high-performance applications in Chrysler, Dodge, Jeep, and Ram 6.2L Hellcat and Trackhawk engines. Designed to handle the extreme demands of these supercharged HEMI V8 powerplants, these pistons provide enhanced strength, durability, and precision fitment. Whether you are building a race engine or upgrading for improved reliability and power, this piston set offers a direct replacement solution that meets the rigorous standards of modern performance builds.\u003c\/p\u003e\u003cp\u003eThese pistons are ideal for enthusiasts and professional builders seeking to maximize engine efficiency and longevity under high boost and high RPM conditions. Their forged construction and optimized design ensure consistent performance and resistance to wear, making them a trusted choice for serious Hellcat engine upgrades.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe DSS Racing FX Series pistons incorporate advanced engineering and materials to deliver superior performance and reliability. Key features include:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003ePrecision forged construction for maximum strength and durability\u003c\/li\u003e\n\u003cli\u003eFlat top design with -1.5cc dish volume for optimized combustion chamber dynamics\u003c\/li\u003e\n\u003cli\u003eComp height of 1.275\" for accurate piston-to-head clearance and compression ratio control\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\u003ePin diameter of .945\" with options for full-floating or press-fit installation\u003c\/li\u003e\n\u003cli\u003eCompatible with 6.2\" connecting rods and 3.578\" stroke crankshafts\u003c\/li\u003e\n\u003cli\u003eAvailable in multiple dish volumes (65cc, 74cc, 85cc) to tailor compression ratios from approximately 9.2:1 to 11.36:1\u003c\/li\u003e\n\u003cli\u003eDesigned specifically for the 383 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\u003eEach piston in the FX Series is crafted from high-grade forged aluminum alloy, providing an excellent balance of lightweight strength and thermal conductivity. The forging process enhances grain structure and mechanical properties, ensuring the pistons withstand the intense pressures and temperatures generated by supercharged Hellcat engines. The flat top design promotes efficient combustion and power delivery, while the precise machining guarantees tight tolerances for optimal ring seal and minimal friction.\u003c\/p\u003e\u003cp\u003eThe pistons feature robust ring lands and reinforced pin bosses to endure the stresses of high RPM operation. The option for full-floating or press-fit wrist pins allows builders to customize installation based on engine requirements and preferences. Overall, the design reflects a focus on durability, performance, and compatibility with factory and aftermarket components.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis piston set is engineered as a direct fit for most Chrysler, Dodge, Jeep, and Ram 6.2L Hellcat and Trackhawk engines, simplifying installation without the need for extensive modifications. The pistons are compatible with the factory 4.125\" bore size and designed to work seamlessly with OEM or aftermarket connecting rods and crankshafts matching the specified dimensions.\u003c\/p\u003e\u003cp\u003eInstallation should be performed by experienced engine builders or technicians familiar with high-performance engine assembly. Proper ring end gap setting, piston orientation, and clearance checks are essential to ensure reliable operation and longevity.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSet of forged flat top pistons sized for 4.125\" bore\u003c\/li\u003e\n\u003cli\u003eWrist pins (full-floating or press-fit options depending on SKU)\u003c\/li\u003e\n\u003cli\u003eDetailed specifications for compression ratios and piston dimensions\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, professional engine builders, and racers upgrading or rebuilding 6.2L Hellcat and Trackhawk engines. It suits applications ranging from street performance to track use where enhanced strength, durability, and precise compression control are critical. Whether building a high-boost supercharged engine or a naturally aspirated race motor, these pistons provide a reliable foundation for increased power and engine longevity.\u003c\/p\u003e","brand":"DSS Racing","offers":[{"title":"FX-1 4032 Alloy \/ Pistons - Pins and Locs Without Rings","offer_id":47381001797844,"sku":"1-6850-4125","price":689.95,"currency_code":"USD","in_stock":true},{"title":"FX-2 2618 Alloy \/ Pistons - Pins and Locs Without Rings","offer_id":47381001830612,"sku":"2-6850-4125","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":47381001863380,"sku":"3-6850-4125","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":47381001896148,"sku":"K1-6850-4125","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":47381001928916,"sku":"K2-6850-4125","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":47381001961684,"sku":"K3-6850-4125","price":1087.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/0002127_4_991ece4d-043e-4507-9aad-841f8657c028.webp?v=1771667027","url":"https:\/\/fasthemis.com\/products\/6850-4125-6-2-small-block-mopar-hemi-gen-iii-fx-series-1-5cc-flat-top-gen-iii-hemi-forged-piston-set-4-125-inch-bore-pin-dia-0-945-comp-height-1-275","provider":"FastHemis","version":"1.0","type":"link"}