58 Red part numbers indicate new items WARNING: Cancer www.P65Warnings.ca.gov . WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov . s l MAIN STUDS Application 2-Bolt 4-Bolt ACURA - SEE HONDA/ACURA, PAGE 60 AUDI - SEE VOLKSWAGEN, PAGE 61 BMC/TRIUMPH A Series 206-5401 s B Series (3 cap main) 206-5402 s B Series (3 cap main) 206-5402 s B Series (5 cap main) 206-5403 s 2.0L SOHC TR7 206-5404 s Austin Healey 6-cylinder 206-5405 s BMW 1.5L-2.0L (M10) & 2.3L (S14) 4-cylinder 201-5001 l 2.5L (M50), 2.8L (M52), 3.0L (S50US) & 3.2L (S52US) inline 6 201-5000 s 3.2L (S54) inline 6 201-5002 s BUICK V6 Stage I & II 123-5401 s V6 Stage II without windage tray 222-5602 s V6 Stage II with splayed cap bolts 322-5802 s 215 cid aluminum V8 124-5401 s 350 cid 124-5402 s Application 2-Bolt 4-Bolt BUICK (CONTINUED) 401 cid (nail head) 124-5404 s 400-430-455 cid (hex) 125-5401 s 400-430-455 cid (12 pt nuts) 125-5402 s CADILLAC 472-500 cid 135-5507 s CHEVROLET, SMALL BLOCK 400 cid with windage tray 234-5606 s 400 cid with windage tray & splayed cap bolts 234-5605 s 400 cid with windage tray & 3.0˝ outer studs 234-5607 s Large journal (hex) 134-5401 s 134-5601 s Large journal (12 pt nuts) 134-5403 s Large journal with aftermarket (4-6 bolt) wind- age tray 3.25-3.48” stroke 234-5501 s 234-5601 s Large journal with aftermarket (4-6 bolt) wind- age tray 3.50-4.00” stroke 234-5610 s Large journal with splayed cap bolts 234-5602 s Large journal with straps (F & R caps) 234-5503 s 234-5603 s Large journal with straps & splayed cap bolts 234-5604 s LT-1/LT-4 with factory windage tray (1992-97) 134-5502 s Small journal 134-5402 s 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 190,000 psi tensile strength, and precision J-form threads rolled after heat-treat to create a fastener that has threads 2000% stronger than others. MAIN STUDS 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.