Pontiac 400 Torque / Honing Plate 108MM Max Bore

$395.00 USD

Pontiac 400 V8 Torque Plate


If you are here, you know what these are for. Most serious engine rebuilder will use one of these plate to hone an engine. This plate recreate the stress a block see when the head is torqued down. I have been asked to make a plates for the Pontiac 400 c.i.  engine so I now stock them. The plates also comes with all 4 different spacer height that are clearly identified for easy assembly.

These plate will fit on all Pontiac V8 that share the same head design as the 400. 

They are CNC machined out of 2″ thick 6061-T6 aluminum. Stainless steel insert are included so it can be used numerous time without damaging the mounting hole. The spacer also give you the proper height so you can use the stock bolt length.

It is suitable for bore up to 108MM for those seeking maximum displacement on these engine, but they obviously can be used on smaller bore too. Bigger bore available on request. I can also make a plate for any motor!


  • A Honing plate
  • 10 Stainless Steel Spacer

These plate will ship to Canada and the United State for free!

Additional information

Weight 14 lbs
Dimensions 20 × 8 × 4 in


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