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      07-27-2009, 08:43 PM   #18
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Drives: 2011 E90 M3 Comp Pkg Only
Join Date: Nov 2007
Location: Astral Projecting: ∞ 23.516 -122 02.625 0242.101 ĕv'rē-hwr'

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Originally Posted by swamp2 View Post
I would bet the tubing is hydroformed, this process uses very high fluid pressure along with a "mold" for the outside shape desired. The tubing is very purposefully shaped into a non round cross section in certain sections. My guess (without looking under my car recently) is that it is for clearance - either to other parts of the chassis or to the ground.

On another note we debated the need for exhaust shields quite a bit on this thread. My conclusion was just what IND is saying above. A user installed heat sheild sounds like a darn good way to play it plenty safe with any aftermarket exhaust system. Link to that thread here.

Thanks, I must have missed that thread. I am probably going to play it safe and get some sort of shield on my exhaust.