2.8 ARP rod bolts on 3.4 rods? (Page 1/1) Modesto APR 27, 11:40 PM Everything I can find doesn't say it WON'T work, but I haven't found anything that says WILL. I would assume if they did work then ARP would list them for multiple applications, but that's the thing about assuming... Blacktree APR 28, 11:56 AM The 3.4 and 2.8 ('85 and up) use the same rods. So I don't see why they wouldn't interchange. Modesto APR 28, 01:46 PM Thanks Blacktree, I read that 2.8 rods were .030 wider on the pin end and not forged but perhaps that was a mistake on someone's account. Either way I can't imagine the would change the bolt size. If my 3.4 rods end up needing resizing I think I'll give the ARP's a go. Lou6t4gto APR 28, 11:13 PM look at the part # On The rod, they are the same.