Cat-back vs. Axle-back

[beefcake]

no real power gains,

we have systems starting in the 4's and up just depending on the route you want to go

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[OppoLock]

Oh, the stock setup doesn't have an x or h pipe? It's just straight?

I'm completely new to this btw..so I will ask many stupid questions.

From what I understand...

catback: whole exhaust system except headers - deletes resonator as well?
axleback: only half an exhaust system, generally from rear axle area to muffler

what is this x/h pipe replacing? it's the place near the front axle right? so there will have to a lot of cutting/welding to put that in?

anyone have a link to how much sound increase? or ballpark a percentage of sound increase?

Stock exhaust goes like this:
Headers into cats > mid-pipe resonator (in place of X/H crossover) > mufflers

Catback: replaces mid-pipe resonator with X/H mid-pipe and changes mufflers.

Axleback: retains mid-pipe resonator and changes mufflers.