taking off the cat

I have a 99 3000gt sl and I'm thinking about just straight out removing the catalytic converter.... any guys have photos or advice?! thanks a lot

I have a 99 3000gt sl and I'm thinking about just straight out removing the catalytic converter.... any guys have photos or advice?! thanks a lot

Advice? Best advice I can give is if you have emissions is to hold on to your old cat conv. just incase.

Test pipe replacement is possibly one of the best N/A mods you can do especially for the price, your car will pull hard and all the way to redline. Def. one of those mods once you do you will actually notice a little gain in power. They rate it for 7-8hp, which isin't bad for $40.
There are mods out there that people are paying $500 or more just for 10hp so not a bad deal.

He is right it is a neat and quick little boost. Just make sure to have the new gaskets to put on it when you replace to prevent the exhaust from leaking out by your door. I had put my old ones on and had to pull it off and replace them. But as he says keep it around in case you need to pass inspection.

agh... test pipe...

why not buy the stillen downpipe that not only replaces the restrictive stock, but it ALSO deletes the main cat?

And as an added bonus, during install, you can gut your precats

if you have emissions, ignore the stillen pipe, but you can still gut your precats and buy a test pipe/save main cat.

I dont think all SL's have precats do they, I just thought it was the cali spec? and the VR4/Stealth TT.

You are right it is the turbos and the Calis.

yeah. his 99 is the cali.

another suggestion is to replace your catalytic converter with a glasspack to act as a resonator. that's what i was being told when i was asking about my exhaust. you can put on a new exhaust at a later time.

The Stillen is only for TT's.

Listen if you want the best setup go with a custom catback that any exhaust shop can make for you which will be much cheaper, then replace the cat with a test pipe, you may pick one up at 3sx.com for like $40. After that if you really looking to take advantage of your exhaust system, look into headers, or a downpipe. Downpipes are more cost effective and the one at 3sx dynos at 13hp to the ground which is really good considering the very short amount of upgrades avalilable for the N/A that actually add power.

The Stillen is only for TT's.

damn it, that's right.

what would you need to make it happen?

smartest thing to do is , go buy some used cats, gut them out its easy put those on so when u have to pass smog later on u just swap bak in ur good cats pass then swap out ur empty ones also it helps when u get poped by a cop he looks down there he will see cats on the car and not know there hollowed out so yeah thats what i did with all my cars and it saved me alot haha instead of seeing no cat and a test pipe they saw a cat that was my test pipe :-d

He doesnt have precats.

does anyone ever sell the stuff they get out of their cats? because it is a rare metal that is worth good money.

does anyone ever sell the stuff they get out of their cats? because it is a rare metal that is worth good money.

Yes the exhaust shops will take the metals to recyclicing centers or metal shops for a little extra cash, even junk yards will take old cats and mufflers.

ur fuken kidding me the stuff in side the cat is worth money to me wtf i been gutting them out for years for free no profit damn no way

ur fuken kidding me the stuff in side the cat is worth money to me wtf i been gutting them out for years for free no profit damn no way

Lol oh yeah those exhaust shops make a huge profit off scraps and extra piping you have no idea, when you add it up its a nice number...

does anyone ever sell the stuff they get out of their cats? because it is a rare metal that is worth good money.
Dude whole 3s main cats are selling for $135 shipped right now thru a buyer on 3si.

I sold two to the guy for $250 shipped. It cost me $8 to ship them to him.

Yeah, if you don't have emissions to worry about toss the cat(s).

im gana start saving that matirial from the cats then

Most recylclers want a whole cat.

Most recylclers want a whole cat.

Time for some pre-cat eliminators for me.

He doesnt have precats.

I thought from 95+ all 3/S' had precats - calispec.

It would make sense to keep putting them in, as emission laws here got more strict. Not remove them in 99, but put them in 96

In 94/95 the Cali-spec NA cars got precats. (Just a note. Just because its called Cali-spec doesnt have anything to do with where the car originally was sold)

Then starting in 96 all NA's had precats.

do you guys with the vr4's get smog tested for inspections? where i live they dont check ur exhaust fumes on awd cars all they do is look for a cat with the lil mirror they use, so if i gutted my pre cats they wont know and i can still pass inspections correct?