4kqs Exhaust

[Dylan Jenkins <dylan@vt.edu>]

There were a few messages on list recently about exhaust and I wanted some
clarification......

Blaufergnugen! sells a sport exhaust (2.5", cat back with resonator and
muffler) for approx. $399. Their OEM type (2"?) goes for about $299.
Following the suggestions on the list, I found the best muffler shop in town
(according to the local Audi guru) and priced a similar system as the Blau
setup. The cost was in line with what others on the list found - $175-200
depending on muffler type and pipe diameter; which brings me to my question(s):

1) How much back-pressure is needed from the exhaust system, i.e.,
can/should I go with a zero-restriction muffler?
2) Any significant performance difference between 2.25" and 2.5" pipe?
3) Is the resonator needed other than for acoustics? (My 4kqs currently does
not have a resonator so I'm used to the growl)

Overall - any suggestions on the best overall exhaust system (esp. pipe
dia., muffler type)? Thanks!

Dylan Jenkins

Forestry Extension Associate
Virginia Tech Dept. of Forestry
228-A Cheatham Hall (0324)
Blacksburg, Virginia 24061	       
(o)540/231.6391
(f)540/231.3330
dylan@vt.edu