i've run quite a few catless setups and the following will always result:

trumpeting
machine gun sounding raspiness
tinny sound
idle that sounds like a cropduster

not quite like the 04s and prior

 

IDK Prochamber fixes a lot of that!

 

ok, a little confused here on the h-pipe, dont all of the v8's come with the h-pipe, if they do why buy a different one, or am I missing something here

 

When you see OR-H that means Off Road H-pipe. OR means no cats. (louder, more HP, etc)

 

im in the process of removing my prochamber (n/cats). for a off-road X, the more i hear these S197 w/ the (281) i really the X, the tinny sound seems better to me. a more distinct sound/ our cars will never sound like the SN95, not w/out ported heads anyway. but atleast i will sound like a race car and not a big boat.

 

I got my MRT high flow H because:

high flow cats

maintains the H because I like that sound (versus the X)

cats mounted further back than stock position (affecting flow and sound)

 

Awe, Just ditch the Cats, get the OR-H, and Re-tune.