Exhaust Manifold-to-Downpipe Flange S...

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Author Message   Brian (Bthaxton) Member Username: Bthaxton Post Number: 110 Registered: 02-2003 Posted on Monday, April 05, 2004 - 03:38 pm:    . . . Are they Grade 5 or Grade 8? I already know they are 8x30MMx1.25 thread, but need to know the strength. I am considering replacing them with bolts. Someone also please post if this is a bad idea. I am having trouble finding metric 1.25 thread Grade 8 bolts locally. Grade 5 are everywhere, and I could substitute these until I can order the Grade 8. When I say "Grade 8" I DO NOT mean "8.8" on the bolt head. That means Grade 5 in metric sizes. Not to insult anyone, but many people make that mistake. Thanks in advance.   Brian (Bthaxton) Member Username: Bthaxton Post Number: 112 Registered: 02-2003 Posted on Monday, April 05, 2004 - 03:45 pm:    Sorry, the studs are on a '97 D1.   Rob Davison (Nosivad_bor) Dweb Lounge Member Username: Nosivad_bor Post Number: 1772 Registered: 02-2003 Posted on Monday, April 05, 2004 - 05:14 pm:    just go grade 5 then, nothing critical about this componenet. will just loosen up or bend and then you have a ticking noise. you either tighten or replace. keep the high grade stuff for steering or suspension, where if it breaks you could get killed. rd   marc olivares (Pugs) Senior Member Username: Pugs Post Number: 432 Registered: 12-2002 Posted on Monday, April 05, 2004 - 08:10 pm:    your fine with the G5 studs/bolts. m