VWDiesel.net The IDI, TDI, and mTDI source.

Engine Specific Info and Questions => TDI Engine -General Info => Topic started by: redneck_vdub on April 16, 2010, 03:16:23 pm

Title: Straight pipe exhaust..?
Post by: redneck_vdub on April 16, 2010, 03:16:23 pm

I have a mk4 golf. i am thinking about doing a 2.5" straight pipe exhaust from the turbo back. ive heard you are supposed to leave the catalytic converter on, is this true? Or am i safe doing all straight pipe?

Title: Re: Straight pipe exhaust..?
Post by: ryanp on April 17, 2010, 10:26:05 am

take off what you like, as long as the police dont mind or your inspection place. In the UK no-one minds as long as it does not smoke like a train!!

Mines got a straight pipe but still has the CAT, that's next on the 'remove' list!!

Title: Re: Straight pipe exhaust..?
Post by: smiffie88 on April 18, 2010, 12:56:13 pm

i got a straight through exhaust comes out just infront of the rear wheel no issues as of yet other than it being noisey

Title: Re: Straight pipe exhaust..?
Post by: redneck_vdub on April 18, 2010, 01:07:14 pm

Awsome. Thanks for the advice guys!  ;D

Title: Re: Straight pipe exhaust..?
Post by: ryanp on April 20, 2010, 03:38:41 am

Quote from: smiffie88 on April 18, 2010, 12:56:13 pm

i got a straight through exhaust comes out just infront of the rear wheel no issues as of yet other than it being noisey

That's almost what i'm looking at doing with my mk2, 3" all the way!!, you got any pics?

I'm thinking of coming out behind the front wheel!

Title: Re: Straight pipe exhaust..?
Post by: rolo on April 20, 2010, 12:46:07 pm

too much racket ryan, had to take my 3" straight thru further back, to, in front of, rear wheel, as per smiffie. Turbo whistle is still v loud at low revs.what engine you got in the van?

Title: Re: Straight pipe exhaust..?
Post by: Rabbit on Roids on April 21, 2010, 08:56:50 am

Quote from: ryanp on April 20, 2010, 03:38:41 am

Quote from: smiffie88 on April 18, 2010, 12:56:13 pm

i got a straight through exhaust comes out just infront of the rear wheel no issues as of yet other than it being noisey

That's almost what i'm looking at doing with my mk2, 3" all the way!!, you got any pics?

I'm thinking of coming out behind the front wheel!

coming out behind the front wheel will be loud, smell of diesel all the time, and be illegal. pretty sure your exhaust is supposed to exit behind the passenger compartment. might be a us only law tho.

Title: Re: Straight pipe exhaust..?
Post by: smiffie88 on April 21, 2010, 01:28:46 pm

the law in the uk just says the exhaust needs to exit on the drivers side of the vehicle.

i changed from a 3inch to 21/2 inch and didnt notice any difference tbh its not worth the extra hassle

Title: Re: Straight pipe exhaust..?
Post by: ryanp on April 24, 2010, 12:51:53 pm

I've got a 250hp+ 1Z, might do it behind the passenger door in front of the wheel. I'll see what tubing comes up at the time 2.75/3" is what i'd like!

Title: Re: Straight pipe exhaust..?
Post by: rolo on April 28, 2010, 11:29:01 pm

What you done to that 1z?