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nav12c
08-03-2004, 03:02 PM
Hi Guys,

I've been doing some ringing around about the above topic and from discussions have been advised that a dual 2.5' system is the way to go. I'm only looking at cat back at the moment. Does this sound about right?

Also, pricing has ranged from $500 - $900. what could the big difference be?

Thanks for any helpde provided.
Nav

SirHSV
08-03-2004, 10:11 PM
Big difference could be Muffler quality or was it Stainless Steel that he quoted you? And were Flange fittings included, tips could also be costly?
I found price would vary a lot from workshop to workshop, so do some more ringing around.
Dual 2.5' is the way to go I’ve got it on the Monaro.

white_lie
08-03-2004, 10:59 PM
Yep, definately twin 2.5". Pricing will vary because of mufflers and the bends they use. Some may use press bends while others will be mandrel (which costs more as its more time consuming). Shop around to find a good quote, but more importantly, find somewhere that you think you'll be happy with the service rather than just the product.

I'd highly recommend some headers and twin cats though as well. You'll get a good increase in the note from a cat back system, but no real noticable power improvement.

nav12c
09-03-2004, 09:38 AM
thanx for the replies guys. yeah, the one i'm probably going to go with is actually recommended to me and is actually at the lower end of the price range. I asked him and he said that its press bent (at that price) and that i have a choice of a few tips etc. I'm going to go have a look around at his workshop and he is actually going to have a similar car there for me to have a look at.

also, later on if i do want to go the headers and twin cats, will i have to change this setup again or can i still utilise it?

Thanks,
Nav

SirHSV
09-03-2004, 06:01 PM
I think you can still utilise the setup!!

white_lie
09-03-2004, 10:25 PM
yeah, you'll be able to match it up to new headers and cats later on down the track

GTO_012
15-03-2004, 07:42 PM
Just got a price for the GTO for extractors and 2 and a half system madrel bent cost $2100 gst included. The beast will sound like a F@#%ing V8 super car the way it should sound from the factory. They said that we will only increase the KW by around 25 because HSV have already push its limits releasing it with 285KW. Just have to save for the 3/9s in the diff and I will be one happy camper. Custom exhaust specialist in Brisbane are the guys. Great people to talk with. They built the Donut King Jet Van.

-HSV-
16-05-2004, 05:54 PM
hey, i have a 5lt and im just posting a pic of my system i currently have for interest sake, has one of the BEST notes you'll ever hear :)

pacemaker extractors, into the CATs, which exit via a twin 2.5" system then into a 3" single :)

pic below:

http://www.streetcommodores.com.au/forum/attachment.php?s=&postid=243694

RedR8
17-05-2004, 09:02 AM
Go for mandrel bent. There is no point paying for a new exhaust that is press bent as it will have restrictions in it. You are defeating the purpose of getting a bigger system so it is worth a few extra $$$.

My $0.02

HSVVTIIR8
18-01-2005, 08:28 AM
I might get flamed for this but if you want a cheap good exhaust Redback systems are a mandrell off the shelf system and will set you back between $450-$550 to buy and then probably $100 to fit. Your HSV cats are fine so I wouldnt replace them and your headers will be ok, although I did replace mine with HM try-y's (with ceramic coating) as I am chasing horsepower. Some people reckon Redback systems dont sound the best but I think it does the trick and bang for buck you cant beat it. However, they aren't stainless but should last to about 5 years or more anyway. Also after fitting an exhaust you may experience an increase in fuel as mine went up to 2L/100km more than before but an edit will fix that and bring it back down to normal.
My VTII Clubbie is now pushing 229rwkw with the above mentioned exhaust, 2nd **** mod & K&N filter and MAFless tune. Before the MAFless my car had 202rwkw. So the exhaust does work well.

HSV GOD
12-07-2005, 02:18 AM
difillipo extractors duel hi flow cats into straight through mufflers duel 2.5 inch pipeing all the way...............................dumped at the diff :wink: ....................RUMBLE CITY

-HSV-
12-07-2005, 12:49 PM
Big difference could be Muffler quality or was it Stainless Steel that he quoted you? And were Flange fittings included, tips could also be costly?
I found price would vary a lot from workshop to workshop, so do some more ringing around.
Dual 2.5' is the way to go Iíve got it on the Monaro.you wont be paying anymore than $40 a tip i wouldnt reckon...