decat question

hi there

how do you bolt together say a header with a 2.5" end collector with a decat 3" catback ?

is there something that goes in between to adapt?

thanks for any help in advance :thumbsup:

You use what is called a 'test pipe'. This replaces the Cat converter. Very illegal to run a test pipe on the streets.

I think his asking how to go from 2.5'' to 3 inch'' piping.

Exhaust shop is your best option. They will probably stretch the metal piping then weld on a 3'' flange to fit the 3'' exhaust system

They call it a reducer, similar to silicon hoses " a piece of pipe that that reduces 3" to 2.5"

Thanks alot everyone :D

but will the exhaust shop be willinging to make a 'reducer' for me since its illegal?

which exhaust shop would you recommend i go to?

why do you want to run a test pipe anyway? you will gain dick all power, ur car will smell like shit and the exhaust gases will annoy people behind/around you... and then you will be annoyed when you get EPA'd by someone that can tell u've removed the cat.

firstly i dont want to run a test pipe.

secondly,
cool story bro- i had a good time figuring out what youre trying to say....


ps. what are you talking from experience being epa'd n sh1t ?

Exhaust shop supply reducers off the shelf

1. Running without a cat is what I'm referring to.
2. Edited my post so you can comprehend simple English.. and don't start on incorrect grammar.
3. I got EPA'd after being pulled over... had a GT5533r - stand next to an aeroplane and you will hear a similar sound.
4. I was just looking out for you here... Cons outweigh pro's, maybe you would realize if you inhaled less carbon monoxide... but have fun with your 0.2hp gain
5. Hopefully you get EPA'd and learn the hard way :)

i sense much hate and aggression in your posts. you had obviously failed back then with your turbocharging and what not, and now you've bombed my thread with useless posts about your life fails that do not contribute to anything.

thanks mate, youre a champ. have a good one.

no exhaust shop would willingly would make or allow a car with a test-pipe or no cat , run on the street.

IF you told them its for a track only car....they would. But the onus is on YOU. You cant blame the exhuast shop when the police fine you or EPA fines you for not having a cat.

yeah. obviously i have to and willing to take on the responsibilities and risks of what i do. i hope nickk understands this also and moves on. Cheers bennjamin.