good call on the weight issue.....had not thought about that! (and i am almost always thinking about that!) of course, it may be easier to route two smaller pipes side by side (thinking of the 3.5" pipe dia...)
Not sure how the 535i exhaust will give us clues... that is even bigger (more room for pipes) than the 335. Please explain - thanks!
-jac
Quote:
Originally Posted by 335ito135i
Ideally it would be one pipe to save weight. Also, one 3.5 inch pipe flows as much as two 2.5 inch pipes. Due to less friction from less surface area. Only one 3.5 inch pipe weighs 40% less, around 20-30lbs'. If it is separate, when I buy my aftermarket tbe, I'll get a single anyway for these reasons.
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