I can tell I've got a hole in my exhaust, and knew it was there when I got it. I'm torn between the flowmaster american thunder, and SLP loud mouth. I've listened to sound bits of them both, and it's pretty hard.

I was wondering what owners of them thought of their's.

 

what year is yours? i have the SLP on my car right now. it sounds great to me. but flowmasters sound great also. SLP will flow better from its straight threw design.

 

blowmasters < SLP

 

I've got a 95 Z28. To me it sounds like flowmaster= a throatier sound and SLP is just outright louder but not as throaty.

 

Thats probably the best way to explain it

 

Flowmaster without the CAT sounds throaty too, even without headers....