{"product_id":"6847-4055-6-1-small-block-mopar-hemi-gen-iii-fx-series-4cc-dome-top-gen-iii-hemi-forged-piston-set-4-055-inch-bore-pin-dia-0-927-comp-height-1-21","title":"DSS Racing FX Series +4cc Dome Top Forged Pistons 4.055\" Bore: Fits most Hemi Models","description":"\u003ch3\u003eDSS Racing FX Series Forged Pistons\u003c\/h3\u003e\u003cp\u003eFits Most Chrysler \/ Dodge \/ Jeep \/ Ram 6.1L SRT8 Models\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e1-6847-4055D \/ 2-6847-4055D \/ 3-6847-4055D \/ K1-6847-4055D \/ K2-6847-4055D \/ K3-6847-4055D\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 Pistons are precision-engineered performance components designed specifically for the Chrysler, Dodge, Jeep, and Ram 6.1L SRT8 engines. These pistons are built to enhance engine durability and efficiency while supporting higher compression ratios for improved power output. Ideal for enthusiasts and professional builders looking to upgrade their 370 Small Block Mopar Hemi Gen III engines, these pistons provide a reliable foundation for high-performance builds and track-ready applications.\u003c\/p\u003e\u003cp\u003eWith a bore size of 4.055 inches and a +4cc dome top design, these pistons optimize combustion chamber volume to help achieve the desired compression ratios ranging from approximately 9.47:1 to 11.91:1, depending on the combustion chamber size. Their comp height of 1.21 inches and compatibility with full-floating or press-fit wrist pins make them versatile for various engine configurations.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eEngineered for performance and durability, the DSS Racing FX Series pistons offer the following key features:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eForged construction for superior strength and resistance to high stress and heat\u003c\/li\u003e\n\u003cli\u003e+4cc dome top design to increase compression and improve combustion efficiency\u003c\/li\u003e\n\u003cli\u003eCompatible with 4.055\" bore size engines, tailored for 6.1L SRT8 applications\u003c\/li\u003e\n\u003cli\u003ePin diameter of .927\" available in full-floating or press-fit options for secure wrist pin retention\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\u003eStroke compatibility of 3.578\" and connecting rod length of 6.243\" for precise engine geometry\u003c\/li\u003e\n\u003cli\u003eDesigned for 370 Small Block Mopar Hemi Gen III engines with a comp height of 1.21\"\u003c\/li\u003e\n\u003cli\u003eAvailable in multiple combustion chamber volume options (65cc, 74cc, 85cc) to tailor compression ratios\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThese pistons are crafted from high-grade forged aluminum alloy, ensuring exceptional strength-to-weight ratio and durability under extreme operating conditions. The forging process enhances the metal grain structure, providing superior resistance to cracking and deformation compared to cast pistons. The dome top design is precisely machined to optimize combustion chamber shape and volume, improving thermal efficiency and power delivery.\u003c\/p\u003e\u003cp\u003eThe pistons feature carefully engineered ring grooves and pin bosses to maintain ring seal and wrist pin stability during high RPM operation. The option for full-floating or press-fit wrist pins allows builders to select the best fitment for their engine setup, balancing ease of assembly with performance requirements.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThese DSS Racing FX Series pistons are designed as direct replacements for most Chrysler, Dodge, Jeep, and Ram 6.1L SRT8 engines, making installation straightforward for experienced engine builders. Minimal modifications are typically required when upgrading from stock pistons, provided the engine bore size matches the 4.055\" specification. Proper ring end gap and piston-to-wall clearance should be verified during installation 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 per selected SKU)\u003c\/li\u003e\n\u003cli\u003eWrist pins (full-floating or press-fit depending on selection)\u003c\/li\u003e\n\u003cli\u003ePiston rings compatible with 1.2\/1.2\/3mm groove dimensions (may vary by package)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eIdeal For:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThese pistons are ideal for performance enthusiasts, professional engine builders, and racers seeking to upgrade their 6.1L SRT8 engines for increased compression, improved durability, and enhanced power potential. They are well-suited for street performance, drag racing, and track applications where reliable high-RPM operation and thermal stability are critical.\u003c\/p\u003e","brand":"DSS Racing","offers":[{"title":"FX-1 4032 Alloy \/ Pistons - Pins and Locs Without Rings","offer_id":47381006581972,"sku":"1-6847-4055D","price":739.95,"currency_code":"USD","in_stock":true},{"title":"FX-2 2618 Alloy \/ Pistons - Pins and Locs Without Rings","offer_id":47381006614740,"sku":"2-6847-4055D","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":47381006647508,"sku":"3-6847-4055D","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":47381006680276,"sku":"K1-6847-4055D","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":47381006713044,"sku":"K2-6847-4055D","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":47381006745812,"sku":"K3-6847-4055D","price":1147.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/0002106_4_40fdca37-e98f-4377-9b0a-40dc62735848.webp?v=1771667018","url":"https:\/\/fasthemis.com\/products\/6847-4055-6-1-small-block-mopar-hemi-gen-iii-fx-series-4cc-dome-top-gen-iii-hemi-forged-piston-set-4-055-inch-bore-pin-dia-0-927-comp-height-1-21","provider":"FastHemis","version":"1.0","type":"link"}