Originally Posted by Serpentene

IMHO nothing beats stock for longevity... nobody goes aftermarket for reasons of increasing parts longevity...

General Performance Stages::
Stage I - ECU TUNE, 6.4 PSI stock exhaust
Stage II - ECU TUNE, EXHAUST SYSTEM (Mufflers decrease pressure 2.6 PSI..hi-flow air intake K&N, B&M panel filter)
Stage II.5- ECU TUNE, EXHAUST SYSTEM (Cat-back, Catalysts 200 cell, Mufflers, cold air intake..)
Stage III - (Headers exhaust manifold,full cat back exhaust,100 cell cat decrease back pressure 1.5 PSI)


A system is only as good as is the whole sum of its parts......

If you're not tuning the engine management to make use of the aftermarket part
it's probably not doing much regardless of what your ears hear or your placebo butt dyno feels...

if you decide on a Stage II setup...it includes an Stage I ECU/M tune.

I own a couple of motorbikes. I changed the exhaust on my Harley for the sound purpose only. Definitely hurt the power performance...but I'm not racing the Harley.

A Porsche TT as a super car is a different animal entirely. If you're going to modify I recommend doing it proper justice if you do the exhaust don't skip the 1st stage.

Originally Posted by cikastef

I see. What is MM style? Is MM style a synonim for second Gen?
And does the mileage on it matter and how can you verify it? Do they loose some of their properties over time (sound change, hp gain etc.) anybody?<!-- google_ad_section_end --> <!-- / message -->