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ARP

ARP Mopar Koffel BTS Head Stud Kit

$363.00 $315.33 Save $47.67

SKU: A00M 145-4012

In Stock
In Stock
Ships by Jun 7
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Non-Returnable Item
INSTALL DIFFICULTY
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Description

The ARP 145-4012 is a professional series cylinder head stud kit for Chrysler 383, 400, 413, 426, and 440 Wedge engines. It features a black oxide finish and 6-point hex nuts. The studs are constructed from premium grade 8740 chrome moly alloy, heat-treated to 200,000 psi, and centerless ground for exceptional straightness and concentricity.

These studs are thread-rolled after heat-treat, providing superior fatigue strength. The precise manufacturing tolerances ensure that gaskets and cylinder heads glide into position for perfect alignment, preventing issues associated with inferior head studs.

Fitment

Fitment Guaranteed

Don’t gamble
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

BrandARP
Part NumberA00M 145-4012

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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