Buick 400 430 455 Connecting Rods

Molnar Big Block Buick 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 too which also increases fatigue life. All Molnar connecting rods are fitted with highly durable premium bronze bushings for use with full floating pin type pistons. Each rod set for the Buick big block engines includes ARP2000 series fasteners which are a Molnar Technologies proprietary design, assembly lubricant and installation guidelines.

The 400, 430 and Buick 455 connecting rods listed on this page are available for engines using a stock stroke crankshaft, as well as for offset ground and aftermarket stroker cranks. If you have any questions about which rod set is correct for your application please do not hesitate to contact us and we will be happy to assist you.

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.

Molnar H Beam Buick Big Block Rods

400 Buick H Beam rods

Buick 455 connecting rods

Molnar Technologies Big Block Buick Rod Specs and Prices

  • Length Length of the connecting rod, as measured center to center, in inches.
  • Wt Weight in grams, of one complete connecting rod assembly
  • Desc Additional information about specific applications
  • Jrnl Crank rod journal diameter
  • Pin Size Piston pin diameter, in inches or millimeters
  • BE Width of the crankshaft end of one rod
  • PE Width of the piston end of one rod
  • Bolts Rods come with 7/16" diameter ARP2000 fasteners installed
  • Part Number Molnar Technologies Connect Rod set part number
  • Price The price shown is for a complete set of rods for the engine

Buick 400 430 and 455 Rods including Big Block Buick stroker rods

Part Number Length Wt Desc Jrnl Pin BE PE


$822.50 $710.39
6.600 769 Big Block High Performance and racing replacement for stock rods. Can be used to replace stock rods in most any application. These fit the stock crankshaft journal size, are the stock length and use the stock wrist pin size but they are bushed to use with a floating piston pin. 2.249 1.000 0.925 1.122


$822.50 $710.39
6.600 745 Big Block High Performance replacement for stock rods but using a .990 diameter floating wrist pin 2.249 .990 0.925 1.122


$822.50 $710.39
6.607 749 Big Block High Performance replacement with pistons using a press fit, stock 1.000 inch diameter wrist pin 2.249 1.000 0.925 1.122


$822.50 $710.39
6.700 735

Big Block Buick Stroker rods for use with crankshaft rod journal of 2.000 inch diameter. 990 wrist pin.

These rods are most often used when making a stroker crank from a stock crankshaft by offset grinding the rod journals.

2.000 0.990 0.925 1.125


$822.50 $710.39
6.800 751 Big Block Buick Stroker connecting rods for use with crankshaft rod journal of 2.100 inch diameter. 990 wrist pin 2.100 0.990 0.925 1.065


$822.50 $710.39
6.800 762 Long Buick stroker rods for use with crankshaft rod journal of 2.200 inch diameter. .990" Wrist pin 2.200 0.990 0.925 1.065



  1. SIDNEY A SCOTT says:

    Can rods
    BH6600WUB8-A be made with a length of 6.625?

  2. molnarrods says:

    Hello Sidney,

    The length change would require a custom rod as the basic core can not be simply altered to the longer length. We can supply a custom set with all other specs the same, but just the center to center length change if that is what you need.

    If you go custom, other specifications can be altered as well if you need something different.

    If you would like more info on a custom set please contact us and we will be happy to help you.

    Thank you for checking with us.

  3. This would save a lot of machine work if you decide to make them I need a set

  4. molnarrods says:

    Hello Walter,

    These Buick rods are already being built and have been in production for a while so if you need a set they are ready to order.

    Thank you for your interest.

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