Even after all these years the mighty Chrysler 392 Hemi engine is still alive and well. While the early 392 Hemi was original only built for 2 years in 1957 and 1958, it has established itself as one of the most historically significant high performance engines in history. On this page you will find a broad selection of hypereutectic and forged high performance and racing pistons and H beam connecting rods for the classic early 392 hemi engine (1957 - 1958). We also provide custom 392 pistons so if you do not find a set with the specifications you need on this page, please contact us and we will be happy to help.
If you are looking for pistons for the modern 5.7 based Hemi 392 Stroker engine, they are on our website here: Modern 392 Hemi Stroker Pistons
For reference the original stock specifications were:
Chrysler 392 Hemi pistons by ROSS Racing Pistons are used in high performance and racing engines by knowledgeable engine builders the world over. On this page you will find Ross Racing Pistons for use with the 392 Chrysler Hemi engine. They combine light weight, high strength, precision machining and premium materials to build a piston you can depend on for high horsepower, torque and reliability. We offer these superb pistons at very affordable prices.
ROSS includes forced pin oilers and double spirolox on all of their stocking pistons.
Pistons are balanced to plus or minus 2.5 grams throughout the set. You can buy
replacement pistons one at a time as needed. The valve pockets are designed to handle most
camshaft applications. The skirt design allows the pistons to work properly under intense
heat and tremendous side loads without scuffing or splitting cylinder walls. Most normally
aspirated pistons are designed to operate at .004 piston skirt to cylinder wall clearance.
All ROSS stocking pistons include aircraft quality pins that are heat treated and end
ground to work in full floated or press fit applications.
Ross dome top pistons for the 392 Chrysler Hemi feature special hollow dome forgings for maximum strength and minimum weight. Not recommended for nitrous systems over 250 HP or superchargers / turbochargers producing over five psi of boost. Compression ratio is 9.5-1 with a 107cc cylinder head chamber and 10.5-1 with a 97cc chamber. Ring grooves are 1/16, 1/16, 3/16. Aircraft quality .984" diameter wrist pins, weighing 147 grams are retained by double spiro lox, and are included with the pistons.
Ross Racing Pistons Forged Chrysler 392 Piston SetsThe piston sets listed below include 8 forged pistons, 8 wrist pins, and spiro locks. Piston rings are not included in the piston set part number, but are available separately. These pistons will work with the original 392 Hemi rods, or the much stronger Molnar and K1 rods listed below. |
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Bore | Stroke | Rod Length |
Dome CC | Grams | CH | Forged 392 Piston Set | Plasma moly file fit 392 Hemi piston ring set | ||
4.030 .030 over | 3.906 | 6.952" | 22.5 | 578 | 1.955 | ross 99462
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ross rs9771-35
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4.040 .040 over | 3.906 | 6.952" | 22.5 | 582 | 1.955 | ross 99463
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ross rs9771-45
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Molnar Chrysler 392 Hemi Connecting Rod Info and SpecificationsMolnar Technologies H Beam rods are machined from billet 4340 steel, and then heat treated to provide improved strength. To make the rods even stronger, they are shot peened to which also increases fatigue life. All Molnar connecting rods are fitted with highly durable premium bronze bushings for use with floating pin type pistons. Each rod set includes ARP fasteners, moly lubricant and installation guidelines. These rods are for the early Chrysler 392 Hemi originally produced in 1957 and 1958. All Molnar rods are finished in the United States at the Molnar Technologies shop in Michigan. Critical rod dimensions are are held to very precise tolerances of +/- .0001 of an inch, which is the tightest tolerance you will find in the performance and racing aftermarket.
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Description and Length | Weight | Notes | Bolt Size | Rod Pin Size | Pin Size | BE Width | PE Width | Bearing | Part Number | |
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6.950 Chrysler 392 Hemi | 826 | 7/16 X 1.600 | 2.375 | 0.984 | 0.994 | 1.158 | CB-1512 | DH6950YSB8
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Another choice of rods for the 1957 - 1958 392 Hemi are these made by K1. K1 Technologies is producing an extremely strong, 4340 forged rod set at a reasonable price for the 392 Chrysler Hemi engines. These 392 rods are machined to very close tolerances and are far stronger than the original rods. These rod sets come complete with rod bolts, installation instructions and moly lubricant. These rods are designed to use the more modern big block Mopar wedge type rod bearing, which will save you a considerable amount of money over having to go with the original 392 type rod bearings.
Chrysler 392 Connecting Rods K1 Technologies 392 Hemi RodsThese rods use a 426 Hemi rod bearing which is easier to find and less expensive than the original 392 bearings. Use rod bearing Clevite CB1512 or another manufacturers equivalent part number. |
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Description | length c-c |
pin size | big end width | pin end width | housing bore | part # | |
392 Hemi rods with ARP2000 bolts | 6.950" | .984" | stock | stock | stock | k1 dh6950aupb8-a Out of stock, discontinued by K1. Replaced by Molnar Technologies rod set DH6950YSB8-A
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