Exhaust
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New User
Joined: Nov 2006
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Exhaust
I just got true duals with flowmaster 40 series mufflers put on. I previously had a single flow with dual outlet and was dissapointed with it. It was way to quiet. However, the new true duals are not much better. Whats the problem? I still have all 4 cats on there and they arent gutted or anything. Thats got to be whats holding it back, right? Also, the tips are small, people tell me that bigger tips give a deeper sound. Is there any truth to this?
2003 5.4 auto
2003 5.4 auto
Hotshot
Joined: Jun 2003
Posts: 12,338
Likes: 4,349
From: SW VA
Originally Posted by mervins03
Also, the tips are small, people tell me that bigger tips give a deeper sound. Is there any truth to this?
2003 5.4 auto
2003 5.4 auto
If you dont have emissions testing in your state...then go ahead and gut your cats. They are what really hold the sound back...
Junior User
Joined: Oct 2006
Posts: 84
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From: New Orleans East
what about the loss in performance from takin off the cats?? ive always wanted to do it, but so many people have told me about the lack of backpressure actually reduces performance/gas mileage
