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Part number: 155-5201
Product Details
ARP 155-5201 Main Cap Fasteners
Products specifications
Fastener Style Bolt
Fastener Yield Strength (psi) 180,000 psi
Head Style Hex
Main Bolt Style 2-bolt
Nuts Included No
Quantity Sold as a kit.
Washers Included Yes
Works with Windage Tray No
Main Bolt Kit
4Bolt Main

Main Studs
There are many important reasons to use ARP main stud kits, including the elimination of main cap walk and fretting, as well as protecting the threads in your engine block. All kits come complete with hardened parallel-ground washers and high quality nuts. Some applications have provisions for mounting windage trays and have specially designed standoff studs with serrated lock nuts to position the windage tray and lock it securely in place. The studs are manufactured from 8740 chrome moly steel, heat-treated in-house to 200,000 psi tensile strength, and precision J-form threads rolled after heat-treat to create a fastener that has threads 1000% stronger than others.

Main Bolts
Far superior to any other main bolt kit offered for use in competition engines, ARP main bolts are designed to meet the exacting standards and demands of professional engine builders. Forged from 8740 chrome moly, all bolts feature generous under-head radius and rolled threads for the utmost reliability. The threads are rolled after heat-treating, which makes them about 1000% longer fatigue life than most main bolts, which are threaded prior to heat-treating. Available in the popular High Performance Series, which, at a nominal rating of 180,000 psi, is a premium replacement for OEM fasteners, or the 200,000 psi nominal rated Pro Series, application-specific main bolts with reduced wrenching head and are designed for use in competition applications. Parallel-ground, hardened washers are included with each kit.

Reviews
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C
Very satisfied with this company. Ordered the part from another company and had nothing but problems. We found this place and the part was cheaper and they delivered the right part! Will do busy with again.
S
Very happy with my purchase.  SUPER fast shipping and great communication.  Will use again!
V
Really good prices and fast delivery.
F
Order #30897.  Ordered on Monday, received on Thursday.  Exactly what I needed.  Can't ask for anything more.  Definitely will look at Autoplicity again when I need more parts!
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Fitment
Ford Club
1964 Ford Club ALL
1963 Ford Club ALL
1962 Ford Club ALL
Ford Country Sedan
1968 Ford Country Sedan ALL
1967 Ford Country Sedan ALL
1966 Ford Country Sedan ALL
1965 Ford Country Sedan ALL
1964 Ford Country Sedan ALL
1963 Ford Country Sedan ALL
1962 Ford Country Sedan ALL
Ford Country Squire
1969 Ford Country Squire ALL
1968 Ford Country Squire ALL
1964 Ford Country Squire ALL
1963 Ford Country Squire ALL
1962 Ford Country Squire ALL
Ford Custom 500
1968 Ford Custom 500 ALL
1967 Ford Custom 500 ALL
1966 Ford Custom 500 ALL
1964 Ford Custom 500 ALL
Ford F100 Pickup
1976 Ford F100 Pickup ALL
1975 Ford F100 Pickup ALL
1974 Ford F100 Pickup ALL
Ford F-150
1976 Ford F-150 ALL
1975 Ford F-150 ALL
Ford F-250 Pickup
1976 Ford F-250 Pickup ALL
1975 Ford F-250 Pickup ALL
1974 Ford F-250 Pickup ALL
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Return Policy
Returns are easy at THMotorsports
Not happy with a purchase? No problem. We've made returning items as easy as possible. And most purchases can be returned for free for 30 days. Learn more about our Returns Policy