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Main Cap Side Bolt Kit for Late Aluminum Block (06-10 GT)

Item 18255
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      Product Information

      Features, Description, Reviews, Q&A, Specs & Installation


      • Upgraded Hardware
      • 12 Point Head Design
      • Made from 8740 Chromoly Steel
      • Black Oxide Finish
      • Rated at 200,000 psi
      • Made in the USA
      • Includes Side Bolts Only
      • Fits Late 2006-2010 4.6L Aluminum M9 Production Blocks


      Performance Upgrade. Securely install your Mustangs main caps by replacing that old weak factory hardware with high strength ARP Fasteners. ARP Fasteners are ideal for high performance street and track Mustangs.

      Premium Quality. Made in the USA from 8740 chromoly steel with a black oxide finish to resist corrosion, these ARP High-Performance Series Main Cap Side Bolts are hardened to a tensile strength of 200,000 psi to provide superior strength for long-lasting performance. They feature a wide-area flange to provide even load distribution during torquing.

      Application. This ARP Main Cap Side Bolt Kit is designed for use on late aluminum M9 production engine blocks found in 2006-2010 4.6L Mustangs. Includes Side bolts only.

      Fitment: 2006 2007 2008 2009 2010 Details

      MPN# 156-5002

      CA Residents: WARNING: Cancer and Reproductive Harm -


      Customer Reviews (2)

      Write a Review

      Ratings Summary

      5 out of 5 overall rating from 2 customers

      • September 07, 2017

        5 2001 Cobra - SchuylerP

        Fit great

        These fit perfectly for my mid 01 cobra. The 156-5001 arp bolts were too small and these were just what I need since my block is a later aluminum block. If you have a mid 01 cobra after 06-01-01 these should work for you.

        Helpful (8)
      • March 14, 2016

        5 2002 GT - 02gt2v

        always high quality.

        I've never had a problem with arp hardware. I've used this side bolt kit and the main bearing caps showed no signs of cap walk when I disassembled the engine for more upgrades. Plus they are reusable!!

        Helpful (9)

      Questions & Answers (2 answers)

      2 Top Rated Questions

      Will these bolts work on a 2011 gt

      • These will not work on a 2011 GT Mustang as these are for the 4.6L engine. The 2011 GT Mustangs have the 5.0L engine which is a completely different size.

      Helpful (0)

      Is this best for 'light' power adder solutions ? I've heard that the stock cylinder head screws can get stretched when supercharged. Would this assist with strengthening the heads for low boost or lower HP power adder solutions ?150 HP or less for example?)

      • These bolts would be a good addition for low boost applications.

      Helpful (0)
      Post Your Question

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (10) Bolts

      Will It Fit My Mustang

      • Bullitt - 08, 09
      • GT - 06, 07, 08, 09, 10

      Designed to fit late aluminum M9 production engine blocks only

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