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Butler Pontiac 421-428-455 Center Main Caps Billet Steel BPI-BP455C
Steel 4-Bolt Main Caps for Pontiac 421-428-455 with Dowel Pins(Set of 3) by Butler Performance CNC Shop *BLOCK MUST BE ALIGN BORED*
Billet steel main caps machined right here in our CNC Shop
Added notches on each end for ease of removal
Designed and tested in our own blocks and engines
ARP Main Stud Kit Recommended- Part# ARP-194-5601
ALL aftermarket billet main caps require line boring and require the thrust surface to be machined to match your particular block
- Butler Performance
- Item Requires Shipping
- 18.0 lbs.
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