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11-28-2010, 09:42 PM | #23 |
Car Guy
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I would think the cats on the OE headers/exhaust manifolds generate more heat than headers. I am installing headers on my car right now and had plenty of room and access to go ahead and replace the passenger side mount bracket bolts with BMW MotorSport 10.9 bolts and Nordlocks. The OE bolts were all tight and none were discolored as some I have seen, my car is a 07/2007 build. I think the issue with the bolts is related to a process where they were exposed to excessive heat at some point during assembly after reading the TSB, and that is why we have not seen this issue with the E46 M3s.
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12-09-2010, 08:52 PM | #25 | |
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Drives: M235I 2015, 335i 2011
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Quote:
But again this is just something that goes around and not a definitive answer to the real cause. |
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12-09-2010, 08:58 PM | #26 |
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You can get them from Brafasco in Canada.
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11-28-2018, 07:08 AM | #30 |
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Actual current McMaster part numbers:
You'll have to get them from McMaster, but probably more of them than you want, but hey, you can never have too much left over hardware. You need 6 M8x25 and 2 M8x35 (where the Vanos oil accumulator bracket is attached). Yea, you're going to get a heck of a lot more of them than you need, but they're dirt cheap. M8x25 = 90854A167 (Sack of 25) M8x35 = 90854A172 (Sack of 25) Nord-Locks = 91812A430 (5 per pack, so get 2 packs.) |
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