Ok i have si/do flowmaster and was wanting high flow cats for sound and power do you guys think it would help or should i not waste my money. Most people have true duals with high flow cats. I dont want alot of popping crackling sound either so please help.

 

yeah it will sound good. I'm gonna do true dual Flowmaster Super 44s with possibly Hi-Flow cats.

The only crackle you should have is at WOT. Otherwise idle and low rpm will be real deep sounding.

 

clinr0sp It will help with the sound and you will notice it. Power you will not notice a huge gain with the seat of your pants dyno but it is there. Check out my sig for a sound clip.