ARP Main Stud Kit for Ford Side bolts - Early cast iron block M8

ARP Main Stud Kit for Ford Side bolts - Early cast iron block M8

Marsoni

M251S

$63.73

Get it in 3 business days with 1 day shipping. Friday, May 29

ARP Main Stud Kit for Ford Side bolts - Early cast iron block M8SKU: 156 5201 UPC: 672036037727 ARP Main Stud Kit for Ford 289 302 351W Early Cast Iron Block M8 Side Bolts ARP 156 5201 main stud kit secures main caps in Ford 289 302 and 351W engines with early cast iron blocks and M8 side bolts found in vehicles from 1962 to 1995. This kit delivers consistent clamping force to handle high horsepower builds in classic Mustangs trucks and vans. It stops main cap walk eliminates fretting and shields block threads

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Update: Different color packs fit differently. I've purchased two packages, one all-black and one black with the colorful waistbands. The all-black are a little smaller. IMO the all-black run a half to a full size small, and the black with the colorful waistbands run true to size. Listen, all of our bodies and preferences are so different, but these are perfect for my body and my fit preference. They hit at my bellybutton and I would describe the length as short-boyshorts, but not hipsters. Most importantly, they're cotton, which my body reacts much better to these days.

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Reviewed in the United States on February 13, 2026

Verified Purchase

Tat Phoenix

Battle Creek, US

★★★★★ 5

Good quality

Size: Medium, Color: Set-unbl

They fit perfectly and seem well made

WAS THIS REVIEW HELPFUL?YesReportShare

Reviewed in the United States on February 22, 2026