{"product_id":"6840-4100-392-6-4-small-block-mopar-hemi-gen-iii-fx-series-1-5cc-flat-top-gen-iii-hemi-forged-piston-set-4-100-inch-bore-pin-dia-0-927-comp-height-1-21","title":"DSS Racing FX Series Gen III Hemi Forged Piston Set 4.100\" Bore: Fits most Hemi Models","description":"\u003ch3\u003eDSS Racing FX Series Gen III Hemi Forged Piston Set\u003c\/h3\u003e\u003cp\u003eFits Chrysler, Dodge, Jeep, Ram 6.4L 392 Models\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003e1-6840-4100C \/ 2-6840-4100C \/ 3-6840-4100C \/ K1-6840-4100C \/ K2-6840-4100C \/ K3-6840-4100C\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eOverview:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe DSS Racing FX Series Gen III Hemi Forged Piston Set is engineered specifically for the Chrysler, Dodge, Jeep, and Ram 6.4L 392 HEMI engines. Designed to meet the demands of high-performance builds, these pistons offer exceptional strength and durability for enthusiasts and professional builders alike. Whether you are upgrading your engine for increased power or replacing worn factory components, this piston set delivers reliable performance and precision fitment.\u003c\/p\u003e\u003cp\u003eBuilt to handle the rigors of street, strip, or track applications, these forged pistons provide improved thermal resistance and reduced weight compared to cast alternatives. Their design optimizes combustion efficiency and supports higher compression ratios, making them ideal for maximizing the potential of your 6.4L HEMI engine.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThese DSS Racing pistons incorporate advanced engineering and materials to ensure superior performance and longevity. Key features include:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCompatible with 4.100\" bore size for most Chrysler, Dodge, Jeep, and Ram 6.4L 392 engines\u003c\/li\u003e\n\u003cli\u003eForged construction for enhanced strength and durability under high stress\u003c\/li\u003e\n\u003cli\u003eFlat top design with a -1.5cc volume for optimized combustion chamber shape\u003c\/li\u003e\n\u003cli\u003ePin diameter of .927\" available in full-floating or press-fit configurations\u003c\/li\u003e\n\u003cli\u003eRing groove dimensions of 1.2mm\/1.2mm\/3mm for reliable ring sealing and reduced blow-by\u003c\/li\u003e\n\u003cli\u003eDesigned for a 3.720\" stroke and 6.2\" connecting rods, matching factory specifications\u003c\/li\u003e\n\u003cli\u003eAvailable in multiple compression ratios approximately ranging from 9.41 to 11.63, depending on combustion chamber volume\u003c\/li\u003e\n\u003cli\u003ePrecision machining ensures consistent weight and balance for smooth engine operation\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eConstruction \u0026amp; Design:\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eThe DSS Racing FX Series pistons are crafted from high-grade forged aluminum alloy, providing an optimal balance of lightweight properties and structural integrity. The forging process enhances grain structure, resulting in pistons that resist cracking, scuffing, and thermal fatigue even under extreme operating conditions.\u003c\/p\u003e\u003cp\u003eThe flat top piston crown with a slight dish (-1.5cc) is engineered to improve combustion efficiency and reduce detonation risk. The pistons are designed to accommodate either full-floating or press-fit wrist pins, allowing flexibility based on engine build preferences. Ring grooves are precision-cut to maintain ring stability and sealing performance, contributing to improved compression and reduced oil consumption.\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 6.4L 392 HEMI engines with a 4.100\" bore. Installation requires standard engine assembly procedures and may necessitate professional machining to ensure optimal clearances and tolerances. The pistons are compatible with factory stroke and rod lengths, simplifying the rebuild or upgrade process without extensive modifications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's Included:\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eSet of forged pistons sized for 4.100\" bore\u003c\/li\u003e\n\u003cli\u003eWrist pins (.927\") available in full-floating or press-fit options\u003c\/li\u003e\n\u003cli\u003ePrecision-cut piston rings (1.2mm\/1.2mm\/3mm)\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\u003eThis piston set is ideal for performance enthusiasts, engine builders, and racers seeking to upgrade or rebuild their 6.4L 392 HEMI engines. It suits applications ranging from street performance to competitive motorsports, where durability and power potential are critical. Whether building a high-compression naturally aspirated engine or a boosted setup, these pistons provide a solid foundation for reliable power gains.\u003c\/p\u003e","brand":"DSS Racing","offers":[{"title":"FX-1 4032 Alloy \/ Pistons - Pins and Locs Without Rings","offer_id":47381012807892,"sku":"1-6840-4100C","price":689.95,"currency_code":"USD","in_stock":true},{"title":"FX-2 2618 Alloy \/ Pistons - Pins and Locs Without Rings","offer_id":47381012840660,"sku":"2-6840-4100C","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":47381012873428,"sku":"3-6840-4100C","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":47381012906196,"sku":"K1-6840-4100C","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":47381012938964,"sku":"K2-6840-4100C","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":47381012971732,"sku":"K3-6840-4100C","price":1087.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0660\/8542\/1268\/files\/0002081_4_2e76e57b-46a1-47de-ba35-e2900606f17c.webp?v=1771667008","url":"https:\/\/fasthemis.com\/products\/6840-4100-392-6-4-small-block-mopar-hemi-gen-iii-fx-series-1-5cc-flat-top-gen-iii-hemi-forged-piston-set-4-100-inch-bore-pin-dia-0-927-comp-height-1-21","provider":"FastHemis","version":"1.0","type":"link"}