{"product_id":"6847-4125-6-1-small-block-mopar-hemi-gen-iii-fx-series-4cc-dome-top-gen-iii-hemi-forged-piston-set-4-125-inch-bore-pin-dia-0-927-comp-height-1-21","title":"DSS Racing FX Series +4cc Dome Top Forged Piston Set: Fits most Hemi Models","description":"\u003ch3\u003eDSS Racing FX Series +4cc Dome Top Forged Piston Set\u003c\/h3\u003e\u003cp\u003eFits Most Chrysler \/ Dodge \/ Jeep \/ Ram 6.1L SRT8 Gen III Mopar Hemi\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e1-6847-4125D \/ 2-6847-4125D \/ 3-6847-4125D \/ K1-6847-4125D \/ K2-6847-4125D \/ K3-6847-4125D\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe DSS Racing FX Series +4cc Dome Top Forged Piston Set is engineered specifically for the 6.1L Gen III Mopar Hemi engine, commonly found in Chrysler, Dodge, Jeep, and Ram SRT8 models. Designed to enhance engine performance and durability, these pistons offer a precise combination of lightweight construction and strength to handle high-stress conditions. Ideal for enthusiasts and professional builders seeking reliable, high-quality components for street or track applications.\u003c\/p\u003e\u003cp\u003eWith a +4cc dome top design, these pistons increase compression ratios, delivering improved combustion efficiency and power potential. They are compatible with both full-floating and press-fit wrist pins, providing flexibility for various engine builds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThese forged pistons incorporate advanced design elements to optimize performance and reliability:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e+4cc dome top for increased compression and power output\u003c\/li\u003e\n\u003cli\u003eForged construction for superior strength and durability under high load\u003c\/li\u003e\n\u003cli\u003eComp height of 1.21\" to maintain proper piston-to-head clearance\u003c\/li\u003e\n\u003cli\u003ePin diameter of .927\" compatible with full-floating or press-fit wrist pins\u003c\/li\u003e\n\u003cli\u003eRing groove dimensions: 1.2mm top and second rings, 3mm oil ring for effective sealing\u003c\/li\u003e\n\u003cli\u003eDesigned for 3.578\" stroke and 6.243\" connecting rods typical of 6.1L Gen III Hemi engines\u003c\/li\u003e\n\u003cli\u003eAvailable in multiple combustion chamber volumes (65cc, 74cc, 85cc) to tailor compression ratios from approximately 9.74:1 to 12.24:1\u003c\/li\u003e\n\u003cli\u003ePrecision machining ensures consistent fitment and performance\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eManufactured from high-grade forged aluminum alloy, these pistons deliver an optimal balance of lightweight design and exceptional strength. The forging process refines the metal grain structure, enhancing fatigue resistance and thermal conductivity. The dome top shape is engineered to improve combustion chamber dynamics, promoting efficient flame propagation and power delivery.\u003c\/p\u003e\u003cp\u003eEach piston features carefully machined ring grooves and pin bores to ensure tight tolerances and reliable sealing. The option for full-floating or press-fit wrist pins allows builders to customize assembly based on application requirements and performance goals.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThese pistons are designed as direct replacements for the 6.1L Gen III Mopar Hemi engines found in many Chrysler, Dodge, Jeep, and Ram SRT8 vehicles. Installation requires standard engine assembly procedures, with attention to proper ring end gap and piston orientation. No major modifications are typically necessary, making them suitable for both rebuilds and performance upgrades.\u003c\/p\u003e\u003cp\u003eConsult your engine builder or service manual for specific torque specs and clearances to ensure optimal performance and longevity.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSet of forged +4cc dome top pistons (quantity as required for engine configuration)\u003c\/li\u003e\n\u003cli\u003eCompatible wrist pins (full-floating or press-fit options depending on SKU)\u003c\/li\u003e\n\u003cli\u003ePrecision-machined piston rings matching groove specifications\u003c\/li\u003e\n\u003cli\u003eInstallation instructions and technical support documentation\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, engine builders, and racers who demand increased compression and durability from their 6.1L Gen III Mopar Hemi engines. Whether upgrading a street car for spirited driving or building a track-focused machine, these pistons provide a solid foundation for enhanced power and reliability.\u003c\/p\u003e","brand":"DSS Racing","offers":[{"title":"FX-1 4032 Alloy \/ Pistons - Pins and Locs Without Rings","offer_id":47381003239636,"sku":"1-6847-4125D","price":739.95,"currency_code":"USD","in_stock":true},{"title":"FX-2 2618 Alloy \/ Pistons - Pins and Locs Without Rings","offer_id":47381003272404,"sku":"2-6847-4125D","price":769.95,"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":47381003305172,"sku":"3-6847-4125D","price":959.95,"currency_code":"USD","in_stock":true},{"title":"FX-1 4032 Alloy \/ Pistons - Pins - Locs With DSS Racing Rings in a Kit","offer_id":47381003337940,"sku":"K1-6847-4125D","price":937.95,"currency_code":"USD","in_stock":true},{"title":"FX-2 2618 Alloy \/ Pistons - Pins - Locs With DSS Racing Rings in a Kit","offer_id":47381003370708,"sku":"K2-6847-4125D","price":967.95,"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":47381003403476,"sku":"K3-6847-4125D","price":1147.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/0002122_4_462aa115-9d1e-424c-bb2f-e4e748ee5094.webp?v=1771667025","url":"https:\/\/fasthemis.com\/products\/6847-4125-6-1-small-block-mopar-hemi-gen-iii-fx-series-4cc-dome-top-gen-iii-hemi-forged-piston-set-4-125-inch-bore-pin-dia-0-927-comp-height-1-21","provider":"FastHemis","version":"1.0","type":"link"}