{"product_id":"6827-4065-6-1-small-block-mopar-hemi-gen-iii-fx-series-4cc-dome-top-gen-iii-hemi-forged-piston-set-4-065-inch-bore-pin-dia-0-984-comp-height-1-21","title":"DSS Racing Forged +4cc Dome Top Piston Set: Fits most 6.1L SRT8 Models","description":"\u003ch3\u003eDSS Racing Forged +4cc Dome Top Piston Set\u003c\/h3\u003e\u003cp\u003eFits Most Chrysler \/ Dodge \/ Jeep \/ Ram 6.1L SRT8 Models\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e1-6827-4065 \/ 2-6827-4065 \/ 3-6827-4065 \/ K1-6827-4065 \/ K2-6827-4065 \/ K3-6827-4065\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe DSS Racing Forged +4cc Dome Top Piston Set is engineered specifically for the Chrysler, Dodge, Jeep, and Ram 6.1L SRT8 engines, delivering enhanced performance and durability. Designed to replace factory pistons, these forged pistons feature a +4cc dome top that increases compression ratios, improving combustion efficiency and power output. Ideal for enthusiasts and professional builders seeking reliable, high-strength components for naturally aspirated or mildly boosted applications.\u003c\/p\u003e\u003cp\u003eWith a bore size of 4.065\" and a pin diameter of 0.984\", these pistons maintain precise fitment and compatibility with the 371 Small Block Mopar Hemi Gen III platform. The 1.21\" compression height ensures proper deck clearance and optimal piston-to-head geometry for improved engine response and longevity.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThese pistons incorporate advanced design elements and manufacturing techniques to meet the demands of high-performance engines:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eForged aluminum construction for superior strength and heat resistance\u003c\/li\u003e\n\u003cli\u003e+4cc dome top design to increase compression ratio and combustion efficiency\u003c\/li\u003e\n\u003cli\u003eCompatible with full-floating or press-fit wrist pins (0.984\" diameter)\u003c\/li\u003e\n\u003cli\u003eRing groove dimensions: 1.2mm top and second rings, 3mm oil ring for optimal sealing\u003c\/li\u003e\n\u003cli\u003eDesigned for a 3.578\" stroke and 6.243\" connecting rod length setup\u003c\/li\u003e\n\u003cli\u003eApproximate compression ratios vary by combustion chamber size: 65cc (11.94:1), 74cc (10.68:1), 85cc (9.49:1)\u003c\/li\u003e\n\u003cli\u003ePrecision machining ensures consistent piston-to-cylinder wall clearance and balanced performance\u003c\/li\u003e\n\u003cli\u003eCompatible with most Chrysler \/ Dodge \/ Jeep \/ Ram 6.1L SRT8 engines for direct fitment\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eDSS Racing pistons are crafted from high-grade forged aluminum alloy, providing an excellent strength-to-weight ratio that withstands the rigors of high-performance and racing environments. The forging process enhances grain structure and fatigue resistance, reducing the risk of piston failure under extreme conditions.\u003c\/p\u003e\u003cp\u003eThe dome top design not only increases compression but also promotes efficient flame propagation within the combustion chamber. Each piston is CNC-machined to tight tolerances, ensuring precise ring groove dimensions and pin bore alignment. This meticulous engineering supports reliable sealing, reduced friction, and improved engine efficiency.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eInstallation \u0026amp; Fitment:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThese pistons are designed for direct replacement in most Chrysler, Dodge, Jeep, and Ram 6.1L SRT8 engines, including the 371 Small Block Mopar Hemi Gen III and FX platforms. Installation requires standard engine assembly procedures, with attention to proper ring end gap and wrist pin fitment, whether using full-floating or press-fit pins.\u003c\/p\u003e\u003cp\u003eDue to the +4cc dome volume, piston-to-head clearance and compression ratio changes should be verified during assembly to ensure compatibility with the intended combustion chamber size and fuel requirements.\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 kit)\u003c\/li\u003e\n\u003cli\u003eCompatible wrist pins (full-floating or press-fit depending on selection)\u003c\/li\u003e\n\u003cli\u003ePrecision-machined ring grooves ready for standard piston rings (rings not included)\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 6.1L SRT8 engines who seek increased compression and durability. It suits naturally aspirated builds aiming for higher power output as well as mild forced induction setups requiring stronger pistons to handle increased cylinder pressures.\u003c\/p\u003e","brand":"DSS Racing","offers":[{"title":"FX-1 4032 Alloy \/ Pistons - Pins and Locs Without Rings","offer_id":47381019885780,"sku":"1-6827-4065","price":739.95,"currency_code":"USD","in_stock":true},{"title":"FX-2 2618 Alloy \/ Pistons - Pins and Locs Without Rings","offer_id":47381019918548,"sku":"2-6827-4065","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":47381019951316,"sku":"3-6827-4065","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":47381019984084,"sku":"K1-6827-4065","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":47381020016852,"sku":"K2-6827-4065","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":47381020049620,"sku":"K3-6827-4065","price":1147.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/0002050_4_15176574-aec5-421a-8edd-1dc6ccf6a3d0.webp?v=1771666995","url":"https:\/\/fasthemis.com\/products\/6827-4065-6-1-small-block-mopar-hemi-gen-iii-fx-series-4cc-dome-top-gen-iii-hemi-forged-piston-set-4-065-inch-bore-pin-dia-0-984-comp-height-1-21","provider":"FastHemis","version":"1.0","type":"link"}