i hated to just say they suck so i used that button up ^^^ and did a search. this isn't even the info that i have seen but it backs up what i remember. here is the link.

https://ls1tech.com/forums/showthrea...lowmaster+dyno

https://ls1tech.com/forums/showthrea...lowmaster+dyno

 

Ok I have always like the way flow masters sounded on my 1990 silverado. I am getting ceramic edelbrock shorties and custom duals but I'm undecided on a muffler. You guys have been bashing flowmasters so what has a simmilar sound with better performance? anyone have some sound clips to share with me?