Quote:
Originally Posted by kiwis.4.8i
I went fir a 'H' pipe instead of an X pipe.
I got a nice little increase in low down torque, and a positively evil sounding exhaust, especially on start up.
No drone on highway speeds either.
Just an option you could do, cheap and awsome.
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How much did low end torque improve?
There is a difference in sound between X and H pipe.
X pipe tends to produce a high pitched sound and H pipe a lower pitch. H pipe benefits more on the torque side and X the HP side. Since an X5 weighs so much I would choose the H pipe if performance is important. Either way the gains are very minimal on a stock engine.