What exhaust cat-back provides the best HP for the best $?

[Foxfan88]

just get an O/R pipe and put some mufflers and turndowns.
Makes it louder in the car.....

 

[GNN60GT500]

that 7rwhp was probably attributed to many other things. ambient temp, oil temp, coolant temp, etc... you wont even see 7 going from stock to a dynomax.

Want to bet? Let me see if I have my old dyno sheets- (I sold that car over a year ago-)

Oil temp, humidity, coolant temp, intake manifold temp, exc were all the SAME-

The car had upper/lower intake throttle body, K&N, electric fans, pulleys, BBK shorty headers and a catted X pipe-

I gained 7rwhp by switching-

 

[wildstang87]

Want to bet? Let me see if I have my old dyno sheets- (I sold that car over a year ago-)

Oil temp, humidity, coolant temp, intake manifold temp, exc were all the SAME-

The car had upper/lower intake throttle body, K&N, electric fans, pulleys, BBK shorty headers and a catted X pipe-

I gained 7rwhp by switching-

yap if you must but i am a non believer. come on 7rear wheel horsepower from a muffler swap?? when u already had flows on there??

 

[95snoozer]

they dont call them choke masters for nothin

best bang for buck?

dynomax race bullets welded in

 

[GNN60GT500]

yap if you must but i am a non believer. come on 7rear wheel horsepower from a muffler swap?? when u already had flows on there??

1. Im not yapping

2. It wasn't a muffler swap, it was a catback swap- I went from one catback to another- I didnt just weld in some mufflers-

3. I did a muffler swap on my 67 from 3 chambers to Magnaflows and my idle went up about 150 RPM because the car was breathing that much better-

4. www.mach1review.com If a Mag catback can gain close to that over another straight through muffler on a Mach 1- why can't I have gotten about the same gain over a chambered muffler on a bolt on 5.0?

5. Flowmasters sound great, but there is a reason why guys lost hp on 05 GTs after welding in 40 series-

6. Hot ROdding Engine Masters Challenge- the winner gained 28 hp by switching from Flows to Mags- I would be more then happy to give you the name and contact info for the winner if you would like to talk to him yourself

7. Should I go on?