{"product_id":"6840-4075-6-1-small-block-mopar-hemi-gen-iii-fx-series-1-5cc-flat-top-gen-iii-hemi-forged-piston-set-4-075-inch-bore-pin-dia-0-927-comp-height-1-21","title":"DSS Racing Gen III Hemi FX Series Forged Piston Set 4.075\" Bore: Fits most Hemi Models","description":"\u003ch3\u003eDSS Racing FX Series Forged Piston Set\u003c\/h3\u003e\u003cp\u003eFits Chrysler \/ Dodge \/ Jeep \/ Ram 6.1L SRT8 Models\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e1-6840-4075D \/ 2-6840-4075D \/ 3-6840-4075D \/ K1-6840-4075D \/ K2-6840-4075D \/ K3-6840-4075D\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe DSS Racing Gen III Hemi FX Series Forged Piston Set is engineered specifically for the 6.1L SRT8 engines found in Chrysler, Dodge, Jeep, and Ram vehicles. Designed to deliver superior strength and durability, these pistons are ideal for enthusiasts and professional builders seeking to enhance engine reliability and performance under demanding conditions. Whether you are rebuilding or upgrading your small block Mopar Hemi, this piston set offers a precise fit and optimized combustion characteristics to support high-performance applications.\u003c\/p\u003e\u003cp\u003eWith a 4.075\" bore size and a compact 1.21\" compression height, these forged pistons provide a perfect balance of lightweight design and robust construction. They are crafted to withstand the rigors of high RPM and boost, making them a trusted choice for street performance, track, and racing builds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThese DSS Racing pistons incorporate advanced design elements and manufacturing techniques to ensure top-tier performance and longevity:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCompatible with 6.1L SRT8 Gen III Hemi engines from Chrysler, Dodge, Jeep, and Ram\u003c\/li\u003e\n\u003cli\u003e4.075\" bore diameter for precise cylinder fitment\u003c\/li\u003e\n\u003cli\u003eForged construction for enhanced strength and durability\u003c\/li\u003e\n\u003cli\u003e1.5cc flat top piston design to optimize combustion chamber volume\u003c\/li\u003e\n\u003cli\u003eCompact 1.21\" compression height for improved piston-to-cylinder clearance\u003c\/li\u003e\n\u003cli\u003e.927\" wrist pin diameter with options for full-floating or press-fit installation\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 a 3.578\" stroke and 6.243\" connecting rod length\u003c\/li\u003e\n\u003cli\u003eAvailable in multiple dish volumes to tailor compression ratios (65cc, 74cc, 85cc)\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eDSS Racing utilizes high-grade forged aluminum alloy to manufacture these pistons, ensuring exceptional strength-to-weight ratio and thermal conductivity. The forging process refines the grain structure of the metal, resulting in pistons that resist cracking, scuffing, and deformation under extreme heat and pressure. The flat top design with a slight dish volume allows for precise control over compression ratios, accommodating various tuning and fuel requirements.\u003c\/p\u003e\u003cp\u003eThe pistons feature carefully engineered ring grooves that maintain optimal ring seal and reduce friction, contributing to improved engine efficiency and longevity. The wrist pin options—either full-floating or press-fit—offer flexibility depending on the builder’s preference and application demands.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThis piston set is designed as a direct fit for most Chrysler, Dodge, Jeep, and Ram 6.1L SRT8 engines equipped with a 4.075\" bore. Installation requires standard engine rebuilding procedures, including proper honing and cleaning of the cylinder bores. The pistons accommodate a 3.578\" stroke crankshaft and 6.243\" connecting rods, matching factory or aftermarket components for seamless integration.\u003c\/p\u003e\u003cp\u003eBuilders should verify wrist pin fitment and ring end gaps according to their specific engine build and tuning goals. No major modifications are typically necessary, making these pistons a straightforward upgrade or replacement option for performance and durability enhancements.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSet of four DSS Racing Gen III Hemi FX Series forged pistons\u003c\/li\u003e\n\u003cli\u003eWrist pins (full-floating or press-fit options depending on SKU)\u003c\/li\u003e\n\u003cli\u003eCompression and oil rings installed or supplied separately as per configuration\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 automotive enthusiasts, professional engine builders, and racers who demand reliable, high-strength components for their 6.1L SRT8 Mopar Hemi engines. It suits applications ranging from street performance upgrades to competitive motorsports where durability and precise engine tuning are critical. Whether rebuilding a worn engine or upgrading for forced induction and higher power outputs, these DSS Racing pistons provide a solid foundation for enhanced engine performance.\u003c\/p\u003e","brand":"DSS Racing","offers":[{"title":"FX-1 4032 Alloy \/ Pistons - Pins and Locs Without Rings","offer_id":47381014479060,"sku":"1-6840-4075D","price":689.95,"currency_code":"USD","in_stock":true},{"title":"FX-2 2618 Alloy \/ Pistons - Pins and Locs Without Rings","offer_id":47381014511828,"sku":"2-6840-4075D","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":47381014544596,"sku":"3-6840-4075D","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":47381014577364,"sku":"K1-6840-4075D","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":47381014610132,"sku":"K2-6840-4075D","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":47381014642900,"sku":"K3-6840-4075D","price":1087.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/0002072_4_cc7dd6d0-acdd-438a-bc02-adb90642357a.webp?v=1771667004","url":"https:\/\/fasthemis.com\/products\/6840-4075-6-1-small-block-mopar-hemi-gen-iii-fx-series-1-5cc-flat-top-gen-iii-hemi-forged-piston-set-4-075-inch-bore-pin-dia-0-927-comp-height-1-21","provider":"FastHemis","version":"1.0","type":"link"}