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KB 392 Hemi Pistons

Keith Black Hypereutectic 392 Hemi Piston Sets

KB 392 Hemi Pistons

High performance KB hypereutectic 392 Hemi pistons offer a significant performance improvement for your engine, at a very affordable price. We have these piston sets in 30, 40 and 60 oversizes. If you are rebuilding a Chrysler 392 Hemi engine and are looking for improved performance, without the higher cost of forged pistons, KB performance pistons are an excellent alternative for many street, muscle car restoration, cruising and street / strip applications.

We do not recommend hypereutectic pistons for use with superchargers, turbochargers, nitrous systems or for serious racing engines. We recommend forged pistons for those applications and we have them listed on our website here: Forged 392 Hemi Pistons

  • Made from Hypereutectic 390 Alloy with 16% silicon
  • Fully machined head and valve reliefs
  • Accumulator groove to aid with compression ring seal
  • Diamond finished skirts
  • CNC machined pin bores to insure straight and accurately sized bores

KB Hypereutectic Chrysler 392 Hemi Pistons and Piston and Ring Sets

  • Stock 392 specs for reference Bore size is 4.000 Stock stroke is 3.9000 rod length is 6.950 pin size is .984
  • Ring grooves are 5/64 5/64 3/16
  • Crankshaft These pistons are for use with a stock stroke 392 crank
  • Connecting Rods These pistons are for use with stock length rods of 6.950 inches long with a .984 wrist pin size
  • CH Compression Height This is the measurement from the centerline of the piston pin bore to the top flat part of the piston
  • Wt Piston weight in grams followed by wrist pin weight in grams
  • ccs displacement of dome, or dish, and valve reliefs, measured in ccs
  • CR Compression ratio estimates based on a .030 oversize, zero deck and .039 compressed head gasket
  • Bore Size Finished bore size, in inches, that piston is designed for
  • Piston set includes 8 pistons, 8 wrist pins and spiral locks
  • Piston and ring kit includes 1 Complete piston set and 1 Moly piston ring set

These pistons can be used with the stock Chrysler original equipment rods or with the more modern and much stronger Molnar Technologies H beam rods which are listed further down this page.

392 Hemi Flat Top Pistons

KB289 392 Hemi Piston

CH Wt ccs CR with head chamber of: Bore Size Piston Set Piston and Ring Kit
101cc 104cc 110cc
1.940 620 / 132 -4 8.2 8.0 7.7 4.030 + .030 over KB289 30 KB289 KTM30
$697.68 $641.87

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4.040 + .040 over KB289 40 KB289 KTM40
$697.68 $641.87

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4.060 + .060 over KB289 60 KB289 KTM60
$697.68 $641.87

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392 Hemi Dome Top Pistons

kb290 chrysler 392 hemi piston

1.940 588 / 132 22 10.3 10.0 9.5 4.030 + .030 over KB290 30 KB290 KTM30
$738.94 $679.82

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4.040 + .040 over KB290 40 KB290 KTM40
$738.94 $679.82

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4.060 + .060 over KB290 60 KB290 KTM60
$738.94 $679.82

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Molnar Technologies 4340 Steel Billet H Beam 392 Hemi Rods

molnar 392 hemi connecting rod

molnar technologies 392 hemi h beam rod edge

Molnar Chrysler 392 Hemi Connecting Rod Info and Specifications

Molnar 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.

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.

  • Description and Length Engine model that rod is made to for and length of the rod, as measured center to center, in inches.
  • Weight Weight in grams, of one complete connecting rod assembly
  • Notes Additional information about specific applications
  • Bolt Size Bolt dimensions in inches, Rods come with ARP2000 fasteners installed
  • Rod Pin Size Crank rod journal diameter
  • Pin Size Piston pin diameter, in inches or millimeters
  • BE Width Width of the crankshaft end of one rod
  • PE Width Width of the piston end of one rod
  • Bearing Popular rod bearing part number, other equivalent specification bearings may be used based on your preference
  • Part Number Molnar Technologies Connect Rod set part number. Set includes 8 connecting rods
Description and Length Weight Notes Bolt Size Rod Pin Size Pin Size BE Width PE Width Bearing Part Number
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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