Description
Factory main bolts are a critical weak point in high-performance 351W builds—under boost or sustained RPM, they flex and fail, risking catastrophic engine damage. ARP’s chromoly main bolt kit eliminates this vulnerability with premium materials and engineering designed to handle the demands of forced induction, nitrous, and extreme naturally-aspirated builds. If you’re serious about reliability on the dyno or the track, upgrading your main fasteners is non-negotiable.
This 2-bolt main kit delivers the clamping force and material integrity your 351W needs to survive real power levels. ARP’s High Performance Series chromoly bolts resist yielding and fatigue, giving you peace of mind whether you’re turning up boost or chasing lap times.
- Fits 351W 2-bolt mains
- Chromoly material construction
- High Performance Series
- Hex head design
- Black oxide finish
- Small Block Ford application
- Complete kit—ready to install
- MPN: 154-5003
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