i have 2 hours tomorrow before work, and i want to get super 40s put on my car, do you guys think theyre pretty mellow on an ls with the 3.4? whereas at idle it wont be too raspy and startup wont be too loud? i want a nice tone but i want it to be pretty mellow also.

 

I put a single Flowmaster Delta 40 Series on my 3100, and it was LOUD. To be honest, your exhaust sound will change with whatever exhaust tip you put on it. For instance, a bigger open flowing tip will be louder than a smaller tip.

 

I heard Flow 40's on a 3.4 setup on a youtube video. I think he had the whole custom dual tip set, but it sounded nice! Very mean idle and good rev with very lite rasp. I think he went with flow 40's. Here's the clip, I think you'll like the results.

http://www.youtube.com/watch?v=63RaP...eature=related

 

I just got the flowmaster 40 series delta flow. I have the 3.4 l it sounds great I got a 1in 2 out muffler and and made a piece a pipe to go to the other side of the car to make it look like i have duals. Pretty mellow little loud inside. sounds great outside!!

 

that sounds so nice lol, my mom doesnt want me spending more money on my car tho, =/ shed probably notice it, so i think im going to go with an intake first so she wont notice it as much lol

 

but MOMMMMMMMMMMMMMMMMM it's better gas mileage. It will pay for itself!!!

 

Bah...slap that sucker on and let your mom hear it, she'd be impressed enough to think it was a good idea.

 

but...but momma said exhuast is the devil lol

 

You will not loose any power swapping out your mufflers to the Flowmasters. I had Super40s on my car for a while and they sounded good and performed fine with the stock system. I had no loss of power. You will hear a lot of personal opinions on here and other internet forums...just keep in mind a lot of it is hear-say and rumors. I really do not believe any Flowmaster muffler will hurt a stock system in the least bit.

 

You're absolutely right, swapping out the mufflers will give you no gain or loss in power, but it also won't get you 100% of the sound that a full flowmaster exhaust system has. If you do a full cat-back exhaust system, then you can lose a little bit of HP, on the low end, and some torque, unless you have a powerful N/A engine, or it's supercharged/turbocharged, otherwise smaller N/A engines stand to lose some power.