Engines and Components› Engines, Blocks and Components

Butler Performance

Pontiac 4-Bolt Main Bare Block Builder Kit

$16,995.00

SKU: BP-ENGINE-KIT-IAII-CAST

In Stock
In Stock
Ships by Jul 29
Free Shipping
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Professional / shop required

Description

It features an aftermarket Pontiac block with a 4-bolt main, a Butler Ross rotating assembly, and offers forged crank options with a 4.250 or 4.500 stroke. The kit includes Edelbrock heads, a Comp Cam and Johnson lifters, and is compatible with either carburetor or EFI fuel systems. Builder kits are shipped unassembled and require assembly by the user or a professional shop.

Fitment

Fitment Guaranteed

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on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandButler Performance
Part NumberBP-ENGINE-KIT-IAII-CAST
CategoryEngines and Components

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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