beejohn

And also, is there any performance difference between a 400 cell, 200 cell, 100 cell cat?

i know w/a test pipe you cannot pass emissions and the exhaust smells like ****.

w/a hfc you can pass emissions.

but in terms of turbo spool time, both decrease it. but by how much more would the test pipe decrease it? would a test pipe flow better at all RPMs?

beejohn

anyone know?

AEBlessed (1.8G)

a test pipe is a strait pipe with no cat, a high flow cat is a less restrictive cat.

beejohn

i know this, but is a test pipe going to make my car faster than a less restrictive cat?