{"product_id":"6817-4090-426-6-2-6-4-stroker-small-block-mopar-hemi-gen-iii-fx-series-4cc-dome-top-gen-iii-hemi-forged-piston-set-4-090-inch-bore-pin-dia-0-927-comp-height-1-12","title":"DSS Racing FX Series Forged +4cc Dome Top Pistons Set: Fits most Hemi Models","description":"\u003ch3\u003eDSS Racing FX Series Forged +4cc Dome Top Pistons Set\u003c\/h3\u003e\u003cp\u003eChrysler \/ Dodge \/ Jeep \/ Ram 6.2L Hellcat \u0026amp; 6.4L 392 Gen III Hemi\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e1-6817-4090 \/ 2-6817-4090 \/ 3-6817-4090 \/ K1-6817-4090 \/ K2-6817-4090 \/ K3-6817-4090\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 Set is engineered specifically for Chrysler, Dodge, Jeep, and Ram vehicles equipped with the 6.2L Hellcat and 6.4L 392 Gen III Hemi engines. Designed to enhance performance and reliability, these pistons are ideal for enthusiasts and professional builders seeking to maximize power output while maintaining engine durability. Featuring a +4cc dome top design, they offer increased compression ratios tailored to various combustion chamber sizes, making them a versatile upgrade for high-performance applications.\u003c\/p\u003e\u003cp\u003eThese pistons are precision-crafted to meet the demanding requirements of the 426 Small Block Mopar Hemi Gen III platform, ensuring optimal fitment and function. Whether building a street, track, or drag racing engine, the DSS Racing FX Series pistons provide a solid foundation for improved combustion efficiency and power gains.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eEngineered for high-performance Mopar Gen III Hemi engines, these pistons deliver a combination of strength, precision, and enhanced combustion characteristics:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e+4cc dome top design to increase compression ratio and improve combustion efficiency\u003c\/li\u003e\n\u003cli\u003eComp height of 1.12\" optimized for Gen III Hemi applications\u003c\/li\u003e\n\u003cli\u003e.927\" pin diameter compatible with full-floating or press-fit configurations\u003c\/li\u003e\n\u003cli\u003eRing groove dimensions: 1.2mm top and second grooves, 3mm oil ring groove for superior sealing\u003c\/li\u003e\n\u003cli\u003eCompatible with 4.050\" stroke and 6.125\" connecting rods for precise engine geometry\u003c\/li\u003e\n\u003cli\u003eAvailable in multiple combustion chamber volumes (65cc, 74cc, 85cc) to tailor compression ratios from approximately 10.73:1 to 13.53:1\u003c\/li\u003e\n\u003cli\u003eManufactured by DSS Racing, a trusted name in high-performance forged components\u003c\/li\u003e\n\u003cli\u003eDesigned specifically for Chrysler \/ Dodge \/ Jeep \/ Ram 6.4L 392 and 6.2L Hellcat \u0026amp; Trackhawk engines\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThese pistons are forged from premium-grade aluminum alloy, providing an excellent balance of strength, heat resistance, and lightweight characteristics essential for high-revving performance engines. The forging process ensures a dense, uniform grain structure that enhances durability under extreme combustion pressures and temperatures.\u003c\/p\u003e\u003cp\u003eThe dome top design increases the piston’s compression volume by +4cc, allowing for higher compression ratios that improve power and throttle response. Precision machining guarantees tight tolerances for optimal ring sealing and piston-to-wall clearance, reducing friction and wear. The pistons accommodate either full-floating or press-fit wrist pins, offering flexibility depending on engine build preferences.\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 426 Small Block Mopar Gen III Hemi engines found in Chrysler, Dodge, Jeep, and Ram vehicles equipped with 6.2L Hellcat and 6.4L 392 powerplants. Installation requires standard engine assembly procedures, with attention to proper ring end gap and piston orientation.\u003c\/p\u003e\u003cp\u003eDue to the +4cc dome volume, builders should verify combustion chamber volumes and adjust head gasket thickness or deck height as needed to achieve the desired compression ratio. No major modifications are typically required, making these pistons a straightforward upgrade for performance builds.\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 engine requirements)\u003c\/li\u003e\n\u003cli\u003eWrist pins compatible with full-floating or press-fit installation\u003c\/li\u003e\n\u003cli\u003eRing groove machining for 1.2mm top and second rings, 3mm oil ring\u003c\/li\u003e\n\u003cli\u003eTechnical specifications and installation guidelines\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 upgrading or rebuilding Chrysler, Dodge, Jeep, or Ram Gen III Hemi engines. It suits applications ranging from street performance to track and drag racing where increased compression and durability are critical. Builders seeking to extract maximum power from their 6.2L Hellcat or 6.4L 392 engines will benefit from the precision engineering and robust construction of DSS Racing’s FX Series pistons.\u003c\/p\u003e","brand":"DSS Racing","offers":[{"title":"FX-1 4032 Alloy \/ Pistons - Pins and Locs Without Rings","offer_id":47381023424724,"sku":"1-6817-4090","price":739.95,"currency_code":"USD","in_stock":true},{"title":"FX-2 2618 Alloy \/ Pistons - Pins and Locs Without Rings","offer_id":47381023457492,"sku":"2-6817-4090","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":47381023490260,"sku":"3-6817-4090","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":47381023523028,"sku":"K1-6817-4090","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":47381023555796,"sku":"K2-6817-4090","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":47381023588564,"sku":"K3-6817-4090","price":1147.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/0002038_4_db57d519-ab71-46a2-8e1f-0bedbf093f3a.webp?v=1771666990","url":"https:\/\/fasthemis.com\/products\/6817-4090-426-6-2-6-4-stroker-small-block-mopar-hemi-gen-iii-fx-series-4cc-dome-top-gen-iii-hemi-forged-piston-set-4-090-inch-bore-pin-dia-0-927-comp-height-1-12","provider":"FastHemis","version":"1.0","type":"link"}