In the past few months I’ve had a few builds come into my shop with ARP main studs fitted in their VG30 build.  After doing a thorough tear down to do an inspection of components and block as a normal procedure I’ve been finding a growing number of builds are being built with incorrect ARP main studs.  The supplied ARP main stud on the left are incorrect stud. Stud shown on the right is correct Z32 ARP stud.

These incorrect studs originally used in this assembly will cause the stock main girdle to move around (front to back) under load since the stud has a reduced shank. This can cause bearing damage, thrust clearance issues and ultimately cause an engine to fail catastrophically.

So please be sure to inspect your sub assembly parts to ensure they are the proper units and are made for your application.  To purchase the correct ARP main stud kits please contact Coz at www.conceptzperformance.com