snook

iTrader: (5)

So I hear some rattling from my cats in my 96 5 speed SC300.

My car is stock with a K&N filter only.
I'm considering buying a pipe to get rid of all of the cats.

Does anyone know where I can get this piece?
Will there be a bad gas smell without the cats?
Will the exhaust get significantly louder?
Will I gain any noticeable hp?

Should I also replace the manifolds with headers while doing this?

Thank you if you have any links that would be appreciated. I searched but it was taking forever and I didn't find all of these answers.

IOWNALEXUS

iTrader: (14)

Don't do it, your car is OBD2 and if you gut/remove the cat it will throw a check engine light. Its probably a heat shield rattling. You wont notice any HP increase as it will be MINIMAL at best on an N/A car, it will get louder though (which isn't a good thing)

LEX_MAN

iTrader: (2)

It will be slower on low rpm's , but might pick up a little bit power in high.

If its a DD i would not recomend it.

snook

iTrader: (5)

Looks like I wont have to worry about doing this with your comments, thanks guys

Ill check if its a heat shield vibrating

B4TM4N

iTrader: (1)

Also, try shaking the cats to see which one is making the noise and just replace it alone...
I remember one of my first cars was a '93 mazda 626 that had a rattling cat and got it replaced with a new one and the car gained some lost HP... Actually, now that I think of it, I dont know if it was replaced with a new cat or the guy just put a straight pipe to delete it!! either way, a clogged/rattly cat is taking away from your hp..