Quote:
Originally Posted by Fundahl
Interesting. I wonder if all the fancy curves and bends in the quad 1M rear-section is causing extra back-pressure vs a straight shot like some of the 135i exhausts.
I was planning on doing CP-E downpipes and resonated mids first, and then maybe the CP-E or Akra rear-section.
I wonder why Rob came to that conclusion. I remember in my time visiting them in Austin he said the Intercooler was probably the first piece, but that was based on his personal 335i experience. I know the 1M has an upgraded intercooler and radiator vs the other models. (besides "335is"?)
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The 1M has the same intercooler as the 135/335/335is. Berk Technologies said they gained 10HP on the dyno by changing out the stock 1M midpipes to their aftermarket option. I think I'm going to do a Helix IC and Berk Mid-Pipes on my 1M(along with an Accessport)..