I want to gut my cats...is there any good out of it? increase hp anything? also i have 40 series flows im guessing it will be louder....anyone have a sound clip on how there sound?

 

I took mine of and put a straight pipe. I did notice some high end after taking them off.

 

was it alot louder?

 

It will get REALLY loud with a 40 series flowmaster.

 

I gutted mine out. I lost alot of lowend. I used to just tap on the brake and tires would just let loose and now I powerbrake and I can barely get them to spin and I have 4:10 gears! I did gain on topend though hits the rev limiter easy in 1st and chirps most of the time going into 2nd.

It is alot louder. I have 2000 GMC RCSB 5.3 with 3" pipe going into a 3" ultraflow bullet muffler and y-pipe off to duals out the back with magnaflow 3" quad tips. Its got a really loud crackle between 2000-2600rpm.

 

If it were me, I'd try putting in a X-pipe to try to give me back a little bit of my back pressure and maybe help with the sound.

 

it will also get rid of some of that glass pack rasp as well.

 

Here is a single in/dual out Flow40 dumped with gutted cats.

http://www.woracing.com/truck/Sound%...t%20flow40.mp3

IF it were me .. I wouldn't do it on a bolt on truck.

 

yeah thanks for the commets im not doin it....i think im just going with a X-pipe and dual it out but thanks yall

 

I took mine out and had spools made to replace them with so I could take them in and out. IMO, it didn't change the sound. It sounded like ***, and that was with AS&M's, true duals, Magnaflow X pipe, 2 Magnaflow 1in/1out muffs, etc... They were back in 2 weeks after I took them out. BTW, I can't imagine anyone getting anymore power without of them, since you could see right through them when they were out. Just a couple of small screens similar to the screen in the MAF.