you can tell if you have mufflers then u honestly do not lose rear pressure you would be able to tell if you knew you car at all so ya? if u have a different opinion please post not arguing just want to hear other peoples input
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95 mustang mods:bbk cai all mac piping 2.5 l/t headers bosch platnium 2 prong plugs, short shifter
Dressup:tints 15% bullit shift knob
i think you only use backpressure if you have to large of piping I could be wrong though. But I know if you go larger than 2.5 inch you will lose backpressure.
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95 Mustang Cobra
347 Stroker, Cobra Heads/Intake, Comp Cams Magnum 270 cam, Upper/Lower Control Arms, Subframe Connectors, Strange 10 Way Adjustable Struts/Shocks, Eibach Drag Launch Springs, MGW short throw shifter, O/R h pipe, SLP lm1 Catback, K&N big cone filter. Still running on the stock tune
are u planning on gutting your catyletic converters, or jut adding pipe. I gutted the back 2 cats and left the front 2. It sounds great. if you want to hear it i have a sound clip in the thread titled "mustang happanings" page 5 or6 (silver car)-low quality movie. It was easy and its sweet no loss in hp just a gain haha let it roar.
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Ford eats Chevy and Sh!Ts Dodge
Cars are just nuts and bolts were just dumb enough to mess with them!
Real cars don't power the front wheels they lift them!
if you were to remove all cats , then yes you might not lose HP , but low end torque off the line for sure. You might gain some up top , but your sacrificing way too much down low....
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2000 V6 mustang Vert- Boss Shinoda Legacy conversion in progress!!!
Go: GT cat back exhaust with H pipe , K@N air filter Show : Bullitt : door lock knobs , shifter trim ring , fuel door , pedals , Smoked and clear cornered headlights , white face gauges , GT fogs , Mach 1 Grille Delete , Shinoda front chin spoiler, Bunch of Billett stuff , Gt hood scoop , and GT side scoops
2000 V6 mustang Vert- Boss Shinoda Legacy conversion in progress!!!
Go: GT cat back exhaust with H pipe , K@N air filter Show : Bullitt : door lock knobs , shifter trim ring , fuel door , pedals , Smoked and clear cornered headlights , white face gauges , GT fogs , Mach 1 Grille Delete , Shinoda front chin spoiler, Bunch of Billett stuff , Gt hood scoop , and GT side scoops
help me decide im split cats 
