Ford Big Block 390-428 FE Series 12 Point 2 Bolt Main Studs
Part #: 155-5421
List Price: $129.84
Our Price: $86.54
You Save: $43.30
Ford Big Block 390-428 cid FE series (12pt nuts), 2 bolt main, ARP Main Studs 155-5421
ARP Ford Big Block's Main Stud Kits, There are many important reasons to use ARP Main Stud Kits, for Ford Big Block's's including the elimination of main cap walk and fretting, as well as protecting the threads in your engine block. The ARP Main Stud Kits, For Ford Big Block's are manufactured in ARP's own factory using the best materials, processes, designs and engineering.
Every ARP main stud kit exceeds the most stringent aerospace specifications. All kits come complete with hardened parallel-ground washers and aerospace quality nuts. Parallel-ground, hardened washers are included with each ARP Ford Big Block's Main Stud Kit.
STUDS vs. BOLTS
ARP recommends the use of main studs over bolts whenever possible for several key reasons. First is the ability to obtain more accurate torque readings because studs don’t “twist” into the block. All clamping forces are on one axis. By the same token, there is less force exerted on the block threads, which contributes to improved block life (very critical on aluminum blocks). Finally, there are factors of easier engine assembly and proper alignment of caps every time.