New Exhaust
Racer
Joined: Jul 2006
Posts: 275
Likes: 25
From: West Lafayette IN
I have the borla's. They are loud. My neighbors just love me when I start up the car at 5am and let it run for a bit to warm up. Then driving out of my subdivision I make a lot of others happy. 
Race Director
Joined: Jun 2004
Posts: 19,459
Likes: 48
From: Schaumburg IL
CI 7-8-9-11 Veteran
St. Jude Donor '06-'10, '13
If you are running stock manifolds, the SLP's will still be pretty loud. If you put on Long Tube Headers in the Future.. your call will be VERY LOUD
I had the Loudmouths for a while with longtube headers and loved the sound.. but I added a cam and about 100 more HP, and it got even too loud for me
The tone and sound are similiar to that of a Nascar. Inside the car there is also quite a bit of resonance.
Other than installing Cut-outs (exhaust dumps after the headers) the SLP Loudmouths are the loudest cat-back out there.
I had the Loudmouths for a while with longtube headers and loved the sound.. but I added a cam and about 100 more HP, and it got even too loud for me The tone and sound are similiar to that of a Nascar. Inside the car there is also quite a bit of resonance.Other than installing Cut-outs (exhaust dumps after the headers) the SLP Loudmouths are the loudest cat-back out there.
