will installing a catted x pipe on my 09 gt effect my warranty,,,it has cats so fig that the issue,, also i heard the catted sounds better with the borla stingers,,thanx,,sully..
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2009 mustang gt ,5 spd,,,vapor metallic w black ford racing stripes,, pypes o/r h pipe ,,,borla stinger axlebacks,,,8 inch shorty antenna,,,Honeycomb blackout panel,,tinted windows,,,,in oct getting ,,kooks longtube headers,,,,steeda cai,,,, and sctx3 93 octane tune,,,from brenspeed,,,,,,,,,,,,,,,,,,,,,,,,,,,, JOHN" sully ' SULLIVAN
Check with your dealer about that. As far as I understand as long as the x pipe doesn't cause the mal function. my 02$
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2005 Mustang GT, p1sc1 procharger w/3 core inter cooler, 10 psi boost,, 39# fuel injectors, kook long tube headers, high flow cats, x pipe, magna flow mufflers, che lca, anti squat brackets, che tubular lateral stiffener bar, 1 piece aluminum drive shaft, che engine torque limiters, hurst shifter, A pillar boost and oil press gauges. Steeda lowering spring kit. CM delete plates. New eaton posi rear end(600rwhp), 3.73 gears. MAfia maf sensor, 470rwhp, 423ft# torque.
Technically speaking, you are not supposed to touch anything in the emissions system that is not broken... Obviously, since you ran over a pothole or leftover tire tread from a truck and dented your factory cats or whatever..... and you now must replace the broken part, you may replace them with any name- or brand- of part that is CARB- certified without voiding warranty or emissions status.
catted x pipe and factory warranty 
