yourmom6990

if your looking for deep muscle car, go with the flows.
i love the sound of the 1st one. it just makes it seem like your car is going soo much faster, and its soo raspy. i love it.

GregoryA44

flows ftw in an o/r h pipe= pure sex!

Jaybird79

The difference in HP won't be noticable between the two,.. go with the one you think sounds best. That said I'd have to go with Flowmasters. However they aren't stainless steel, and the SLPs are.

kmobrien76

Yeah I'm not concerned about stainless, going to garage it always and drive it 5K a year max...which Flows does everyone recommend?

I want it to sound deep, muscle car'ish...and not cost a bundle..

TOOT

I believe the American thunder is one of Flowmaster's cat back exhaust systems and are a 2 chambered muffler. The 40 series series are also a 2 chambered muffler.
The 10 series is a straight thru or 1 chambered muffler.

rbstang

i voted for option 3 SLP LM2.. its louder/deeper then flows... but quieter then lm1s.

LM2 + H = sexy

stang22jh

I vote flows, not only because i have a set with the o/r h pipe, but because i grew up with mustangs and it is more of the traditional sound. more and more people are turning to the slps and i think they sound great. you will just have to judge which sound you want more, tradition or newradical type sound, they are both nice,butyou are suppose to getbetter hp gains from slp set-up, not huge, but better.

M1ke

slp sounds better. plus everyone and their grandma has flowmasters.