okay i have a good set up, dual flowmasters and h-pipe with headers, i was thinking of cutting out my cats, would this be a really good idea or no, how loud do you think it would be,
It will be alot louder, you will notice a difference in sound quality.
Instead of cutting them out and getting straight pipes put in, id try to hollow the cats. yanno take the guts out of the inside. So u can put the cats right back in with no problems.
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SCTx3Custom-Tune by JJ at Woodbine MotorSports, JLT CAI, Bassani SS AB, KOOKs Long Tubes, KOOKs O/R Xpipe, Livernois Stage 2 Heads, Comp Cams Stg 2 XFI SPR part#:127500, Livernois Lockouts, FRPP 39# Injectors, ARP Head Studs, Autolite HT0 SparkPlugs, FRPP 4.10, CHE LCAs, CHE Anti-squat, FRPP Springs, BMR Adj. Panhard Bar, GT500 Strut Mounts, Eibach Camber Bolts. Track Only:15x4&15x8s Rear-27'' x 10.5'' - 15" Mickey Thompson ET Street Radial, Fronts-26" x 6"-15" Mickey Thompson Sportsman S/R.
Personally I think it's a bad idea, if that's your only car you will probably get sick of the sound on long drives...the hp gains would be minimal as well, also if you ever sell or trade the car you'd have to contend with replacing the cats, not to mention any warranty claims might be voided. I guess I could mention the environment and blah blah, but that's another topic.
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"Goose, Hollywood's fine, I want Viper"
1995 Mustang GT Cnv 347(427 stroker being built!) almost done!
1996 Cobra with Kenne Bell 2.1 Supercharger and every other conceivable part you can bolt on it...650hp upgrade in the works
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Personally I think it's a bad idea, if that's your only car you will probably get sick of the sound on long drives...the hp gains would be minimal as well, also if you ever sell or trade the car you'd have to contend with replacing the cats, not to mention any warranty claims might be voided. I guess I could mention the environment and blah blah, but that's another topic.
Your are 100% correct with this statemant.
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SCTx3Custom-Tune by JJ at Woodbine MotorSports, JLT CAI, Bassani SS AB, KOOKs Long Tubes, KOOKs O/R Xpipe, Livernois Stage 2 Heads, Comp Cams Stg 2 XFI SPR part#:127500, Livernois Lockouts, FRPP 39# Injectors, ARP Head Studs, Autolite HT0 SparkPlugs, FRPP 4.10, CHE LCAs, CHE Anti-squat, FRPP Springs, BMR Adj. Panhard Bar, GT500 Strut Mounts, Eibach Camber Bolts. Track Only:15x4&15x8s Rear-27'' x 10.5'' - 15" Mickey Thompson ET Street Radial, Fronts-26" x 6"-15" Mickey Thompson Sportsman S/R.
I have a 2007 CS GT without cats, its loud, does not help the power and you may have emissions problems depending on the state your in. I would leave them in or get high flow cats
i have an O/R H-pipe on my 05 GT. i had an X last year. it sounds great wide open, is absolutely silent at 70, but everything in between in miserable. i commute at 3 am and 1 pm, so i am never stuck in traffic.
we have an 89 XR4Ti that the previous owner hollowed out the cats and it sounded really bad. i put a new cat on it and it is much better, the muffler guy said the shape of the chamber left was poor for flow and sound.
all i have noticed was that the sounds with the cats on sounded less crisp.
cats or no cats 
. I would leave them in or get high flow cats
