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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 08-25-2012, 10:19 PM   #1
hueyhy
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Join Date: May 2012
Location: Orlando, FL
Posts: 123
My Ride: E46 330i
Exhaust bolt, OEM or hardware store?

going to do the shifter bushings, and I need to remove the exhaust. I ordered new gaskets (x2) and 4 nuts, but the bolts are ridiculously expensive ( about $20 each) so I skipped it. (part number 11621427586, M10x40 for exhaust manifold. link: http://www.pelicanparts.com/cgi-bin/...agon%2C%20Each)

read at some forum said you can buy from hardware store and just use them. But some say bolts on exhaust are special and should stick to OEM. I don't know if its the material should be special or what.

anyone have some thoughts? to get new OEM bolts?(x4, about $100 for four small bolts) or reuse the old ones if possible, or just get the ones from hardware store?

Thanks!
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Old 08-26-2012, 02:39 AM   #2
Alex323Ci
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Join Date: Jan 2005
Location: Huntington Beach -Surf City USA
Posts: 17,126
My Ride: M3 & 323Ci (sold)
well here's what i recall on it. there's a few threads on it if you Search
speculation is those replacement bolts are supposedly "Inconel" material. which keeps them from corroding and snapping from heat and elements. the originals for that area are studs and often break off. so these replacements are the more expensive ones since bmw wants them to last (and used as replacement in other bmws aswell). but if you want to buy some higher grade steel bolts and then just replace everytime (some say that's what they do) that's another option. but they will corrode and possible snap prematurely.

another option may be to use the less expensive torx bolts that the M3 uses for the lower exhaust.

in either case you will want to buy the copper nuts bmw uses on the exhaust.
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Old 08-26-2012, 11:56 AM   #3
dawnpatrol53
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Join Date: Jul 2012
Location: California
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My Ride: 2004 330ci
I have a brand new set of those $20 bolts, copper nuts and gaskets for sale for $65 if you want them.
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