{"product_id":"6817-4125-426-6-2-6-4-stroker-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-1-12","title":"DSS Racing FX Series +4cc Dome Top Forged Pistons: Fits Mopar Gen III Hemi 6.2L \/ 6.4L (11-26)","description":"\u003ch3\u003eDSS Racing FX Series Forged +4cc Dome Top Pistons\u003c\/h3\u003e\u003cp\u003eChrysler \/ Dodge \/ Jeep \/ Ram 6.2L Hellcat, 6.4L 392 \u0026amp; Trackhawk\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e1-6817-4125 \/ 2-6817-4125 \/ 3-6817-4125 \/ K1-6817-4125 \/ K2-6817-4125 \/ K3-6817-4125\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe DSS Racing FX Series Forged +4cc Dome Top Pistons are precision-engineered components designed specifically for Mopar Gen III Hemi 6.2L and 6.4L engines. Featuring a 4.125\" bore size, these pistons offer a +4cc dome top design that enhances compression ratios and combustion efficiency. Ideal for performance enthusiasts and professional builders, these pistons provide a reliable upgrade for high-output applications, including Hellcat, 392, and Trackhawk engines.\u003c\/p\u003e\u003cp\u003eBuilt to withstand the rigors of high-performance use, these pistons support increased power and durability while maintaining tight tolerances for optimal engine balance and longevity. Whether you're building a street machine or a race-ready engine, DSS Racing FX Series pistons deliver the strength and precision needed for serious performance gains.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThese pistons incorporate advanced design and manufacturing techniques to ensure superior performance and reliability. Key features include:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eForged construction for exceptional strength and durability under high stress\u003c\/li\u003e\n\u003cli\u003e+4cc dome top design to increase compression ratio and improve combustion\u003c\/li\u003e\n\u003cli\u003eCompatible with 4.125\" bore Mopar Gen III Hemi 6.2L and 6.4L engines\u003c\/li\u003e\n\u003cli\u003ePin diameter of .927\" with options for full-floating or press-fit configurations\u003c\/li\u003e\n\u003cli\u003eRing groove dimensions of 1.2\/1.2\/3mm to accommodate high-performance piston rings\u003c\/li\u003e\n\u003cli\u003eComp height of 1.12\" for precise deck clearance and piston-to-valve clearance\u003c\/li\u003e\n\u003cli\u003eDesigned for use with a 4.050\" stroke and 6.125\" connecting rods\u003c\/li\u003e\n\u003cli\u003eAvailable in multiple compression volumes (65cc, 74cc, 85cc) to tailor compression ratios from 10.88:1 up to 13.71:1\u003c\/li\u003e\n\u003cli\u003eOptimized dome shape for improved flame propagation and power output\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eDSS Racing FX Series pistons are forged from high-grade aluminum alloy, providing an excellent balance of lightweight construction and structural integrity. The forging process enhances grain flow and material density, resulting in pistons that resist cracking, scuffing, and thermal fatigue. The dome top design increases the combustion chamber volume, allowing for higher compression ratios without compromising piston strength.\u003c\/p\u003e\u003cp\u003eEach piston is CNC-machined to exacting tolerances, ensuring consistent fitment and performance. The ring grooves are precision-cut to accommodate performance rings that maintain optimal sealing under extreme conditions. The option for full-floating or press-fit wrist pins allows builders to customize the piston assembly based on their specific engine build preferences.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThese pistons are engineered as direct replacements for Chrysler, Dodge, Jeep, and Ram 6.4L 392, 6.2L Hellcat, and Trackhawk engines with a 4.125\" bore. Installation requires standard engine assembly procedures, and no major modifications are typically necessary when upgrading from factory pistons. Proper ring end gap and clearance measurements should be verified during installation to ensure optimal performance and longevity.\u003c\/p\u003e\u003cp\u003eDue to the +4cc dome design, these pistons slightly increase compression ratios, so tuning adjustments may be required to optimize engine management and prevent detonation. They are compatible with existing connecting rods and crankshaft stroke specifications listed.\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 per SKU selection)\u003c\/li\u003e\n\u003cli\u003eWrist pins (full-floating or press-fit depending on configuration)\u003c\/li\u003e\n\u003cli\u003ePrecision-cut 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\u003eThese DSS Racing FX Series pistons are ideal for performance engine builders, racers, and enthusiasts seeking to increase power output and reliability in Mopar Gen III Hemi 6.2L and 6.4L engines. They are well-suited for street performance upgrades, track use, and forced induction setups where enhanced compression and durability are critical. Builders looking to optimize combustion efficiency and engine response will benefit from the precision engineering and robust construction of these pistons.\u003c\/p\u003e","brand":"DSS Racing","offers":[{"title":"FX-1 4032 Alloy \/ Pistons - Pins and Locs Without Rings","offer_id":47381022179540,"sku":"1-6817-4125","price":739.95,"currency_code":"USD","in_stock":true},{"title":"FX-2 2618 Alloy \/ Pistons - Pins and Locs Without Rings","offer_id":47381022212308,"sku":"2-6817-4125","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":47381022245076,"sku":"3-6817-4125","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":47381022277844,"sku":"K1-6817-4125","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":47381022310612,"sku":"K2-6817-4125","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":47381022343380,"sku":"K3-6817-4125","price":1147.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/0002041_4_d1df68b1-5215-49e2-82c4-bd4441ec4979.webp?v=1771666991","url":"https:\/\/fasthemis.com\/products\/6817-4125-426-6-2-6-4-stroker-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-1-12","provider":"FastHemis","version":"1.0","type":"link"}