stock mufflers???

[spikeGT_99]

as u can see in my sig, ive got a prochamber with the stock mufflers, is the stock catback robing enough power to justify an aftemarket catback? I really like the sound coming out of the tailpipes, so thats not an issue, im asking because i might have an opportunity to get a steeda catback dirt cheap in the very near future
thanks for any info.

 

[spikeGT_99]

anybody got an opinion?

 

[01mgvert]

Most people will tell you that catbacks are only for sound. The truth is you can probably pick up an additional 8-10 rwhp depending upon the system that you buy. Check out this product review of three catback exhausts: Magnaflow, SLP, and Bassani. The best gains can from the Magnaflow with 12.5 rwhp and 8.2 rwtq. The tests were done on a stock Mach I so the GT results should be slightly lower. Check out this webpage:
http://www.mach1review.com/CATBackExhaustSystemsReview.html

 

[ironmedic]

if u port and polish your mufflers, u can get 20hp

 

[3.8L_of_Pain]

Most people will tell you that catbacks are only for sound. The truth is you can probably pick up an additional 8-10 rwhp depending upon the system that you buy. Check out this product review of three catback exhausts: Magnaflow, SLP, and Bassani. The best gains can from the Magnaflow with 12.5 rwhp and 8.2 rwtq. The tests were done on a stock Mach I so the GT results should be slightly lower. Check out this webpage:
http://www.mach1review.com/CATBackExhaustSystemsReview.html

Good article. It is nice to read factual information, not hearsay.

The only 99+ GT dyno test I am aware of was for the Dynomax 2.5" catback with ultraflow mufflers. It tested + 4.2 rwhp. This article used to be posted on seanhylandmotorsports.com.

 

[mcmmotorsports]

I was just like you a few weeks back. I had the Max O/R X and stock mufflers and was happy with the sound too, but, I wanted it just a tad bit louder. I just welded up Hooker Aero Chamber mufflers and my initial impression was, OH ****T!! MY CAR GOT SLOWER!!!
However, after driving it in the upper RPM's a little more, I realized that I did in fact pick up a few ponys, just lost a little torque down low. No problem, PLUS I got the sound I was searching for too!!