i think my car has 6 cats...is it possible with a help of a off duty exhaust man to remove the first two cats and put straight pipes in their place and still do good in e-check? because the h-pipe and x-pipecatted only have 2 so..just wondering!
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1998 Mustang GT automatic stock gears, some mods...sold
Best et 14.690@94.37 with a terrible 2.24 60ft
New ride 2000 GTP, gutted air box with K&N, 180 thermo
Best Et 14.57@93.35
*mods after run, Autolite 605s, GMPP STB , MPS 3.7
It is illegal to tamper with any emissions stuff and i dont think you will pass emissions. They aren't even worth doing all that work, the cats dont really rob too much. When you get an off road pipe most of the gains are coming from the increased 2.5 inch piping, not the removed cats.
get a catted hpipe or a catted xpipe. it makes a huge differece top end. if you dont care about emissions go offroad, and yes get the pipe with 2 1/2 inch piping.
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1997 Mustang GT, 5spd, red, 17in wheel option, firestone potenza re730's, Magnaflow x-pipe w/cats,
Mac catback with 3 1/2 inc chromes, 3.73 gears, welded and bolted subframe connectors, centerforce dual friction clutch, 5.0 power tower shifter, pioneer headunit, white face guages, Ported Upper Intake, Radar Jammer!, K&n, Yellow live wires, Billet Aluminum Wire Seperators, Screamin Demon coil packs, Autolite double platnium plugs.
I passed emissions easily with my catted Magnaflow X-pipe. Not to mention that the x-pipe with 2 high flow cats is a tremendous weight reduction from the stock mid-pipe with 6 cats. That damn thing was heavy!
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'99 Mustang GT
KB Twin Screw SC @ 9 psi being installed!
Ported lower manifold, P&P Heads, CP pistons, Manley rods, cryo-treated crank, bored and balanced, etc.etc...
Fluidyne Radiator, C&L 80mm MAF, FRPP 70mm TB, JBA Shorty Headers, Magnaflow Catted X-Pipe, MagnaPack Catback, PA Street/Strip Valve Body, FRPP 3:73 Gears, JMS Chip
Eibach Pro-Kit Springs, Bilstein Shocks/Struts, Hotchkis C/C Plates, KB Chassis Support Kit, MM LCAs, Pirelli P7000SS on Torque Thrust II's and Baer Brakes.
how big is the stock tailpipes? 2 1/2? of less, i have facotry exhaust save the flowmasters, is aftermarket tailpipes better, id much rather just cut them off completely! lol
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1998 Mustang GT automatic stock gears, some mods...sold
Best et 14.690@94.37 with a terrible 2.24 60ft
New ride 2000 GTP, gutted air box with K&N, 180 thermo
Best Et 14.57@93.35
*mods after run, Autolite 605s, GMPP STB , MPS 3.7
slashing the cats! 
