Bill Smith
Founder, 1929-2014
Speedy Bill
Since 1952
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ARP Main Bolts for Flathead Ford V8

ARP Main Bolts for Flathead Ford V8

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Please NOTE the following about this product:

  • This item is sold as a set.



Q & A

What's in the Box

Your flathead Ford V8 is how many years old now? And you're thinking about reusing the main cap bolts? Forget it!

Years of service and re-torquing have undoubtedly fatigued your engine's original fasteners, so save yourself some grief by replacing them with new main cap bolts from ARP, the leader in automotive fastener technology. Sold in sets of six, these bolts have special washers and the strength you need to keep that Flathead together for decades to come.

  • The industry standard for automotive fasteners
  • Rolled threads, black oxide finish, ultra high tensile strength
  • Each kit consists of six (6) bolts and hardened washers


1932-53 Flathead Ford and Mercury V-8 engines


  • 1/2"-13 x 3" main bolts and hardened washers

You may also be interested in:

ARP Premium Rod Nuts for Flathead Ford V8
(Part #101AR239)

Repeated torquing of your rod nuts fatigues the threads. Don't take a chance – replace your Flathead Ford V8's old fasteners with the superior strength and quality of ARP rod nuts. ARP specialty hardware can be found in NASCAR, NHRA and IndyCar racing applications, so you can be sure it's strong enough for your flathead.

  • Rolled threads, high strength steel, and black oxide finish  
  • A must when you rebuild your Flathead
  • Castle nut design may differ slightly in appearance from OEM
  • Fits '32-'53 Ford/Mercury V-8 engines using standard 3/8" rod bolts
  • Original flathead bolts are non-serviceable and must be reused
  • Set/16 nuts
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For gas, alcohol and nitro engines.

Learn why using assembly lube is so important in our tech article, Installing New Hardware.