Hi, I just bought a vl commodore and want to know what size straight pipe system should I get, 2.5 or 3 inch, I want the car to sounds RB ish, my friend has a 2.5 inch and it sounds a little bit like a RB but I see allot of vl's sounds like skylines, how do I make mine sound like that.

with a turbo.. 2.5 is the max you would even want to go on an NA, 2 1/4 is the best.

Agreed. Stick with 2�

Ok thanks, straight pipe or normal which is better.

3" straight will give you the best homo sound on the street

No wonder my friends sounds like a bogan vb commodore lol.

Normal will do, I wouldn't pay to get Mandrel on an n/a.

I just want mine to sounds like a skyline thats it

Unless you turbo it the only sound your going to get is the sound of a dying cow. Stick to the stock exhaust and spend your hard earned money on something else

extractors and 2 1/4 catback..

3 1/2inch will be perfect for that skyline sound ---------- Post added 14-10-11 at 02:29 ---------- just read your other thread leave a standard exhaust on it if your worried about it being cheap to run for work

Quote: Originally Posted by FAQFPV [View Post] leave a standard exhaust on it if your worried about it being cheap to run for work Upgrading the exhaust won't have any negative effect on running costs. If anything it'll slightly improve fuel economy

extractors, standard cat 2.5" exhaust ending in a 3.5" dumpy cannon will get a skyline sound if thats what you are after. definatley standard cat otherwise it sounds too airy

would these extractors do? http://www.ebay.com.au/itm/HOLDEN-CO...em 27bf62e413 (http://www.ebay.com.au/itm/HOLDEN-COMMODORE-VL-6CYL-3-0LT-RB30-HURRICANE-EXTRACTORS-/170714653715?pt=AU_Car_Parts_Accessories&hash=item27bf62e413)

i picked up my second hand 2 1/4 exhuast of $50, then sold my stock one of $40 both on here. Theres always extractors popping up for sale with guys doing turbo conversion etc, keep an eye out and get it on the cheap $$ Some original photos have not been recovered yet.

I got these extractors on my VL...I reckon they are a pretty good buy... http://www.ebay.com.au/itm/Holden-VL...em 3cbd57ec07 (http://www.ebay.com.au/itm/Holden-VL-6cyl-Commodore-Extractors-Headers-Brand-New-/260874693639?pt=AU_Car_Parts_Accessories&hash=item3cbd57ec07)

In my experience , 2.5 inch mandrel bent (I put a 3 inch straight through cat in mine, with the twin cam 3 litre) is big enough for any atmo RB30. I often wondered why the Yen doubled in value the year they wanted to put that engine in the VN Commodore ,that would've only been a good thing as the Buick V6 made that car a bag, perhaps it may have been paranoia than many Aussies may have taken up eating sushi and turning Japanese themselves.

Quote: Originally Posted by RB30DEVL [View Post] In my experience , 2.5 inch mandrel bent (I put a 3 inch straight through cat in mine, with the twin cam 3 litre) is big enough for any atmo RB30. A single 2.5" is big enough for a stock 5L. A 3" on a stock NA RB30 would lose power and sound ridiculous!

Quote: Originally Posted by super_sla [View Post] I just want mine to sounds like a skyline thats it buy a skyline then lol. as NZ HSV has said, unless its done right only a turbo model will get you that clean skyline sound. id say nothing more than 2 1/4. but yeh as people have said go to big on a n/a an youve got yourself an A class bogan chariot sounding car. with an n/a , in terms of style and sound. less is more u get more respect for a car thats clean an simple. remember that Some original photos have not been recovered yet.

Ok 2 and a quater it is, but will it still be loud or will it sound stock at 2 1/4?