The six cats need to be REMOVED, and replaced with two high-flow cats...
They will usually come with an X\H pipe setup...
The X and H pipes usually give comparable gains...
The H will have a bit more low end grunt and the X will live a bit better up high... Its just how you want your setup to be....
__________________
Uncle Sam
"What the hell is up with all the gauges?
Calling Captain Kirk, your ride awaits... Phasers on stun...."
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