Outer Limits 4x4 Board

how loud is a 3'' straight through, no muffler, 16lb. boost on a 06gu ute?

in that, how agitated are the police going to be when they hear it?

I'm only running 9psi, but I can tell you that it's not loud.

I know plenty of guys that run TD42 with a 3" straight through with no problems.

I drove mine daily for over 3 months, in sydney, on 35" tyres and dents everywhere. The exhaust never received any attention.

Go for it, they sound sweet, even if you don't like the noise level, you can still put a muffler or resonator in it later, but you wont.
The turbo muffles most of the noise.

Only reason I put a muffler on mine was to pass the engineers cert. The same place did the road worthy. haha. I'd been pulled over by the cops a few times. Only to have a look at the truck and say g'day. I never got fined or defected in Townsville. Drove it down to Brisvegas and Broken hill and tuff truck a few times as well with no problems. My exhaust ended just behind the cab as well so very short. It was only loud at full noise. At idle or just cruising it wasn't much louder than a normal exhaust.

i have a 3" mandrell exhaust with NO mufflers on my turbo td42. its definately not what i would call loud.

had zero dramas from police for noise.

ive got a 3" exhaust no mufflers and ends right behind the ute cab. Its not that loud. sounds good

i had a gu ute with 3 inch and 15psi wasn't that loud could still have a chat in the cab , it had no mufflers and was dumped in front of the diff , drove it for 3 years and went round aus towing a trailer .. never got pulled up in it . had 35s etc on it too .

had a 3" straight through system on gq wagon with a denco unit.sounds awesome and the drone at 2200 rpm puts the kids to sleep on trips.........no negatives...

I have a 3" straight through mandrel bent exhaust on my GQ, and its not loud at all. No droning either. I've fitted the same exhaust to a GU TD42T and it was marginally louder, it had more of a "bark" and the turbo whistle is quite a bit louder too. Nothing over the top though.

Yeah gotta agree that slow cruising and higher up in the rev range it's not real loud.
Straight thru 3 inch from dump pipe back is the way to go
Just booms a little in underground carparks at low revs if you stomp it but what car doesn't....

3" straight thru on GU. Got done by cops in March - $300 something fine.
Not for noise, but more for not complying with 'anti-pollution'.
There are mufflers/bafflers on stock GU, so from cops point of view, modified or not, must also have muffler/baffles.
I didn't bother arguing the point.

I now just have a simple removable muffler. Take it off, put it on all the time depending where Im going. Better yet, would be an internal air operated/electric solenoid operated flange that would dump straight out OR into the muffler.

3" straight thru, 18 psi 100 dB.

06 GU coil cab with a 3" Beaudesert exhaust no mufflers, its fairly loud but not deafening. It has 33s on it now but was definitely louder under load when it had 35s on it. Turbo spool sounds great but I'm probably going to put in a straight through muffler to quieten it down a bit has the novelty of having a noisy truck has worn off a bit

bushy555 wrote:3" straight thru on GU. Got done by cops in March - $300 something fine.
Not for noise, but more for not complying with 'anti-pollution'.
There are mufflers/bafflers on stock GU, so from cops point of view, modified or not, must also have muffler/baffles.
I didn't bother arguing the point.

I know you didn't bother arguing, but, what does a muffler have to do with pollution

It's not a cat, TD42 doesn't have a cat so no anti pollution gear whatsoever

But it probably wouldn't be smart aguing in that situation, I agree

A.J. wrote:

bushy555 wrote:3" straight thru on GU. Got done by cops in March - $300 something fine.
Not for noise, but more for not complying with 'anti-pollution'.
There are mufflers/bafflers on stock GU, so from cops point of view, modified or not, must also have muffler/baffles.
I didn't bother arguing the point.

I know you didn't bother arguing, but, what does a muffler have to do with pollution

It's not a cat, TD42 doesn't have a cat so no anti pollution gear whatsoever

But it probably wouldn't be smart aguing in that situation, I agree

Noise pollution perhaps ??

I have an 04 gu ute got bb turbo on and drove round with it running straight out the dump pipe for abit had no trouble with cops but pretty loud its 3 inch striaght through to the back now and sounds sweet. Just do it u will never look back

I have a gq 4.2 turbo. I got the muffler put in as its the missus daily driver. Sound crap though. Thinking of takin it out but want to hear one without. I drove it with straight out dump pipe and it was loud, don't know how much difference it would have made with a longer pipe.

turborooster wrote:I have a gq 4.2 turbo. I got the muffler put in as its the missus daily driver. Sound crap though. Thinking of takin it out but want to hear one without. I drove it with straight out dump pipe and it was loud, don't know how much difference it would have made with a longer pipe.

heres one with bb turbo & 3" straight thru.
http://www.youtube.com/watch?v=E8G3B3Q4Zkw" onclick="window.open(this.href);return false;