I just had my custom done and I noticed the guys didn't put an X or H crossover - just straight pipes from the LT's back. (see pix in my sig) Its nice work, but never NOT seen dual with the crossovers. DO I NEED THEM and WHY? R/

 

Need? no but you will get better scavenging effect with an X

 

OK...so its better but not necessary? Scavenging does what? Also, what order: Cats - crossover or vise versa? R/

 

X pipe behind cats but as far foward as you can get it. Scavenging acts to pull exhaust out of the ports, increasing flow, as I understand it.

 

when i had true duals it was too raspy for me and too much in cab noise. the x-pipe got rid of all the resonance but still is really loud at WOT.

 

yah...you dont neeeed it..but it should be in there

 

dead on

 

i wouldnt have duals without some sort of crossover pipe. an xpipe will get rid of some if not all of the rasp. it also helps equalize the exhaust flow

 

YOU GOT IT BROTHER, as far forward as possible for best effect

 

in a truck i will say ''need'' x-pipes have shown some nice low end tq. improvements on lsx engines ..

it looks you should be able to stick a magnaflow X in there with little problem