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KB Chrysler Dodge Plymouth Mopar 440 Pistons

Keith Black 440 Pistons

KB Hypereutectic Chrysler 440 Pistons

High performance KB Chrysler 440 pistons offer a significant performance improvement for your engine, at a very affordable price. We have these piston sets available in a wide range of sizes including standard bore and many popular oversizes. If you are rebuilding a Chrysler, Plymouth, Mopar, Dodge 440 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.

Chrysler 440 Engine Specs

For reference the original stock specifications were:

  • Engine block deck height 10.725 inches
  • Cylinder bore standard size 4.320 inches
  • Crankshaft stock stroke 3.750
  • Connecting rod length 6.768 inches
  • Wrist pin diameter 1.0940

We do not recommend hypereutectic pistons for use with superchargers, turbochargers, nitrous systems or for serious racing engines. For those applications we strongly recommend forged pistons. Our complete piston index list for stock replacement, cast, hypereutectic and forged pistons is available here: CE Engine Pistons Index

Keith Black Chrysler 440 Piston Features:

  • Hypereutectic 390 Alloy
  • 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 440 Pistons for use in Chrysler Dodge Plymouth Mopar 440 Engines

  • Stroke These pistons are for use with a 3.750 inch stock stroke Chrysler 440 crank, OEM or aftermarket
  • Connecting Rod Length 6.768 inch
  • Wrist Pin Size 1.0940 inch diameter
  • Ring grooves are 5/64 5/64 3/16
  • 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
  • Bore Size Finished cylinder bore size, in inches, that piston is designed for

What is Included?

  • Piston set includes 8 pistons, 8 wrist pins and locks
  • Piston and ring kit includes 1 Complete engine piston set and 1 piston ring set

Mopar 440 Pistons Flat Top with Step Head

KB184 440 Piston

KB184

NOTES: Compression height of this piston is 1.992" .140" quench dome. Suggest checking quench dome with clay for clearance. Centered pin. Closed chamber heads require the quench dome to be machined down.

CH Wt ccs CR with head chamber of: Bore Size Piston Set Piston and Ring Kit
72cc 80cc 84cc 88cc
1.992
765 / 190
3.5
10.4
9.7
9.3
8.9
4.320 standard KB184

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KB184 KTM

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4.340 + .020 over KB184 20

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KB184 KTM20

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4.350 + .030 over KB184 30

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KB184 KTM30

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4.360 + .040 over KB184 40

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KB184 KTM40

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4.380 + .060 over KB184 60

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KB184 KTM60

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Chrysler 440 Flat Top with Step Head
KB236 440 Pistons

KB236

NOTES: Compression height of this piston is 2.057". .075" quench dome, centered pin. Suggest checking quench dome with clay clearance. Closed chamber heads require quench dome to be machined down.

CH Wt ccs

CR with head chamber of:

Bore Size Piston Set Piston and Ring Kit
72cc 80cc 84cc 88cc
2.057
775 / 190
-4.8
11.5
10.7
10.3
9.9
4.320 standard KB236

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KB236 KTM

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4.340 + .020 over KB236 20

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KB236 KTM20

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4.350 + .030 over KB236 30

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KB236 KTM30

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4.360 + .040 over KB236 40

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KB236 KTM40

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4.380 + .060 over KB236 60

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KB236 KTM60

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Chrysler Plymouth Dodge 440 Flat Top
KB237 440 Flat Top Pistons

KB237

NOTES: Centered pin.

CH Wt ccs CR with head chamber of: Bore Size Piston Set Piston and Ring Kit
72cc 80cc 84cc 88cc
2.067
770 / 190
-8cc
11.2
10.3
10.0
9.6
4.320 standard KB237

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KB237 KTM

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4.340 + .020 over KB237 20

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KB237 KTM20

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4.350 + .030 over KB237 30

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KB237 KTM30

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4.360 + .040 over KB237 40

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KB237 KTM40

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4.380 + .060 over KB237 60

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KB237 KTM60

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Chrysler 440 Connecting Rods

While you are replacing your engine pistons it is a good time to also upgrade your rotating assembly by installing modern connecting rods. Why risk damage to your rebuilt performance engine by using old stock connecting rods that have been through who knows what kind of abuse.

With the high cost of machine shop service these days you can often upgrade to far stronger modern rods for not much more than the cost of reconditioning a set of stock rods.

Molnar Technologies H Beam 440 Connecting Rods

molnar 440 h beam connecting rods

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
  • 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
  • BE Width Width of the crankshaft end of one rod
  • PE Width Width of the piston end of one rod
  • Part Number Molnar Technologies rod set part number. Set includes 8 connecting rods
Description and Length Weight Bolt Size Rod Pin Size Pin Size BE Width PE Width Part Number
6.760 long 440 Mopar RB 852 7/16 2.375 1.094 1.017 1.140

DH6760YYB8-A


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