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Discussion Starter · #1 ·
Okay, I am not overly mechanically inclined, that said, I have read a few posts, and I saw one that I read as essentially saying;
"The larger the exhaust piping, the more available HP(withing reason), but larger pipes reduce low end torque."

Is that correct? My car is a daily driver, and I don't normally run above 4500rpms. I want more out of my car, but not at the cost of the low end.

Any explenation would be appreciated...


486 Posts
Larger piping will help up too an extent. OPnce you pass a certain level you start to loose too much back pressure and modern engines are designed to work with a little back pressure for proper operation. The general consensus is that 2.5" is about the best for good torque while still gaining some extra top end. Though i do know a few people that have done 3" and don't have any problems. The idea of larger is better applies more to turbos, where any back pressure is bad.
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