95Transamkid

iTrader: (1)

Hi right now as it stands I'm running SLP Loudmouths l, ORY, No mufflers, Pacesetter long tube headers and no cats. I've been running without an inspection sticker since 2010. I know I know. Anyway I've only been ticketed 3 times since then for an inspection sticker failure which isnt bad. But the tjird and most recent one left a bad taste in my mouth. So I figured id try to make it "legal"
. But I love the sound of her now its loud and sounds like a beast at WOT the drone at highway speeds doesn't bother much. Hell the *** load of emissions out of the exhaust makes every lady attractive while I'm driving. But my question is will I lose the sound with my setup. Or most important will I lose HP?

LS6427

iTrader: (2)

You're not gonna lose but 3-4 HP......when I gutted my cats the sound changed a little but still sounded great. Maybe psychologically it felt a little more responsive down low but I doubt it made my car faster. I had ~500 RWHP anyway so it wasn't noticeable.

If you need it to be legal and stop getting tickets....put them back on. Plus, its a federal offense to remove them whether you have emissions testing or not. If you get that cop who knows what to look for, you can be quite screwed.

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RJDio

Go Electric cutouts! You have the headers, Y pipe. You could go electric cutouts after the headers and before the Y pipe. After Y pipe go 1 high flow Cat and then a catback setup or cans. Check or ask around if anyone has this setup that passes inspection. If not, you could go true duals, or 1 cat and 2 cans, etc. Lots of options. The hp you lose won't be enough to feel, but you will definately feel low end torque gains. with cutouts open my launches are slow, closed and it gets down the road quick, then down the road you can start opening the cutouts for more horses. I dynoed a difference of at least 15 hp from closed vs open cutouts.

I have Pacesetter long tubes, 2 electric cutouts before Y pipe and it can be as loud as I want it to be, also the cutouts allow you to 'tune' the tone of the exhasut. I can crack the valves a little and you can hear the cam pinging while not making people sick off the fumes and not drawing cops attention.

RJDio

Go Electric cutouts! You have the headers, Y pipe. You could go electric cutouts after the headers and before the Y pipe. After Y pipe go 1 high flow Cat and then a catback setup or cans. Check or ask around if anyone has this setup that passes inspection. If not, you could go true duals, or 1 cat and 2 cans, etc. Lots of options. The hp you lose won't be enough to feel, but you will definately feel low end torque gains. with cutouts open my launches are slow, closed and it gets down the road quick, then down the road you can start opening the cutouts for more horses. I dynoed a difference of at least 15 hp from closed vs open cutouts.

I have Pacesetter long tubes, 2 electric cutouts before Y pipe and it can be as loud as I want it to be, also the cutouts allow you to 'tune' the tone of the exhasut. I can crack the valves a little and you can hear the cam pinging while not making people sick off the fumes and not drawing cops attention.

RPM WS6

iTrader: (3)

What type of inspection do you have? Visual? Sniff? OBD scan (not possible if your car is the '95 mentioned in your username)?

Not knowing the year of your car, if it's a '96+ and all you have is an OBD scan test to pass (this is the case in many states), you can easily pass without cats. All it takes is proper tuning. If you have to pass a visual or sniff though, that would be a different story.

Adding cats will most definitely change the exhaust note by a noticeable amount, especially if you are going from an actual ORY (vs. just gutted stock cat shells) to having cats. I have done this before I can say that I was easily able to notice a difference in sound at all points in the rpm range, from idle to WOT. With cats, it will be quieter/more mellow/smoother, overall less "sharp" of a sound. There are people that prefer each, so you may or may not like it better. But there will definitely be a difference.

As for power, you will lose some, but it should be a relatively small amount. The bigger change will be the sound.

usnfenix

iTrader: (11)

i like cats. maine coons, siamese, shorthair. all make the same noise and are the same pretty much. id say go for it.

RJDio

^^^ important question for ya! If you want to be 'street legal' and get an inspection sticker, do the bare minimum to pass those tests. I've never lived in New Jersey but if they do a sniffer test in your exhaust pipe (say like in CA), you need cats. If a visual inspection, buy a fake cat, they are like $60.00. http://www.jnztuning.com/popup_image...60047d753e50ea
Magnaflow and other types of hi performance cats are about same price but they will restrict flow.

You may not be allowed electric cutouts, besides they leak and a militant inspection facility will not pass you - how do I know?!

95Transamkid

iTrader: (1)

Lol how do you know? I found my inspection sheet I failed for HC ppm at idle. Standard reading is 220 mine was 1216. But I passed everything else emission wise including HC ppm at high idle. The only other thing I failed for was Tampering? I also got a laugh out of the cat/feline post I needed that after all the I've been through ahaha. I have cutouts though just not electronic

95Transamkid

iTrader: (1)

Oh and yea its a 1995 Trans Am OBDl

Goosecaddy05

i love the sound of my exhaust with cats.. gives it a low thunderous sound that's much more intimidating than the raspy tinge you get without them.... you will most def loose power if you have a bigger cube na motor though.... people with smaller motors and heads make on average 20-30rwhp more than i do with my setup.... motor is 418ci with prc 247 heads 11to 1 comp with a 247/250 cam. makes 500rwhp through a m6 ... my 1/34 headers high flow cats are most def holding it back... just cant sacrifice the way it sounds for more

Goosecaddy05

i love the sound of my exhaust with cats.. gives it a low thunderous sound that's much more intimidating than the raspy tinge you get without them.... you will most def loose power if you have a bigger cube na motor though.... people with smaller motors and heads make on average 20-30rwhp more than i do with my setup.... motor is 418ci with prc 247 heads 11to 1 comp with a 247/250 cam. makes 500rwhp through a m6 ... my 1/34 headers high flow cats are most def holding it back... just cant sacrifice the way it sounds for more

RJDio

oh yea the old Hydrocarbons Parts per million, they did a sniffer test. They also got you on visual inspection. New Jersey sounds a lot like CA, I lived there for 18 years and went thru hell on my cars. This is why states like TX, FL, LA, etc. have gained so many car enthusiasts over the years and socialist states like CA and NY have lost a billion dollar aftermarket industry.

If my car, I'd ask an emissions expert if this will pass; 2 high flow cats, 2 high flow mufflers, run duals with an X pipe. Sniffer test in 1 exhaust pipe thru it's own cat may reduce the hydrocarbons to within spec. OR....find a shop that does exhaust work AND inspections. See if you can supply the cats and mufflers and they can install / pass. Some militant shops will want to return your shop to factory specs....again, how do I know. lol....

You it inspected, done right. THEN put in some bolt on cutouts that seal up real good. Next time you inspect, bolt in those cutouts and take to SAME shop that did the work. Good luck, I feel your pain, been there!

hawk584

iTrader: (1)

What Y pipe are you running? anyhow, I'm 99.9383849% since there is no O2 sensor after the Cat, cut a section out of the exhaust pipe, have some flanges welded on or just clamp a Cat in for both visual and sniffer. Then when it's done remove the cat and reinstall the pipe. Mufflers are just for sound, not emissions. Because my Firehawk was build by SLP I was able to talk an exhaust shop into installing an SLP high flow cat and believing that it was a factory installed item. E-cut outs are fun too! but not really needed with a the LM1 since it's just a 18''x4'' hollow pipe.

Colesitzy

I bought my car cat less, blew a hole in my headers and had to get new ones. I forgot to order them cat less and they didn't sound the same, eventually had them cut out. I guess it's a personal opinion really, but I'd lean to no cats.