PC-16 Exhaust Restictions

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Oct 14, 2008 | 10:29 PM

qUaTtRoA4

Thread Starter

Senior Member

Joined: Dec 2006

Posts: 1,953

From: Redding, California 1998.5 A4 1.8TQM

PC-16 Exhaust Restictions

from what I can gather, the most restrictive part of the stock exhaust system is our Cat....

I was wondering....if I run a HFC, will i need full catback for a ko4 pc-16 setup?

thanks

1998.5 1.8TQM

Oct 15, 2008 | 05:11 AM

Quattro_1.8t

2nd Gear

Joined: May 2007

Posts: 781

From: Columbus, OH

I'm not positive but I think you need a full exhaust for the PC-16 to operate to its full potential. You could get away with stock though.

Oct 15, 2008 | 05:21 AM

Audi_Skydiver

4th Gear

Joined: Aug 2006

Posts: 5,769

From: Phoenix Arizona

I ran a stock exhaust for a while when I had my A4. It was running the PC-16 file as well. I then put a 2.5 inch exhaust w/magnaflow 14816 muffler with the stock cat and it made a nice difference:

http://www.youtube.com/watch?v=KCKfQgACBJA

Josh

Oct 15, 2008 | 09:50 AM

euro_2nr

3rd Gear

Joined: Dec 2007

Posts: 1,503

From: Illi-noice

Some are recommended but IMO is not necessary. A HFC or a simple 2.5'' DP is all that is needed to shoot your exhaust out. Exhaust is the least of my concerns