i just straight piped my cats on my avalanche with a 3 inch single borla xr-1... the sound is just nasty... however i get this like 1/2 throttle rapping sound that im not super fond of... everything else i love... i was thinking about what if i get a single 3 inch cat and put it right after the y pipe it would cure this but keep most of the nasty good sound i now have... something like a dynatec race cat or something that is super highflow... i am doing a front mount turbo this spring and i want to run a cat for the final exhaust setup for the turbo and i was thinking i would kill 2 birds with one stone... any ideas guys?!

 

well if you will be running a turbo you wil have a DP. i would just wait til you get the turbo. do u have a sniffer test?

 

No sniffer test here... But I have to tone down this sound! Its way to much!

 

a cat will just make the raspy sound go away. i would put a good size magnaflow on it

 

Single large magnaflow cat? Will that support my future turbo and cam?

 

yes, you can always add a cut-out for extra flow if you feel it is holding you back

 

beautiful idea... Love the way that sounds... Are there anymore options for high flow cats? Or is magnaflow the absolute best...