| VZ Holden Commodore (2004 - 2006) Talk about anything relating to the VZ Holden Commodore. |
11-10-2006, 04:19 PM
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Ride: VZ Thunder V6
Join Date: Oct 2006
Posts: 1
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alloytech exhaust
want a nicer note from my VZ Thunder V6 alloytech, any suggestions, what have people done that has worked well. Have talked to exhaust shops some only recommend dual system for the alloytech, others say stay clear only single. Could I change rear muffler only. Not after heaps of noise or power gains just a nicer note
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11-10-2006, 07:43 PM
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go
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Ride: vz sv6 M6
Join Date: Feb 2006
Location: SHIRE
Posts: 880
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all gen111 ute exhuast will bolt up to your cats, and as far as i no everyone that gets a complete new exhaust got dual.
as for the rear muffler. i had mine removed from my sv6, but i had it made so the muffler can be bolted straight back up. it sounds pretty good, but a full exhaust would be better
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16-10-2006, 06:31 AM
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Ride: VZS-Ute06
Join Date: Aug 2006
Location: Melbourne
Posts: 71
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Check out the dual Difilippo 2 1/4 cat back 
I've heard only good things
I'm looking for somewhere close to Kensington to fit my ute
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VZ-Rob
98 Ron Powerchip: CAI: SuperLows: GTS Swaybars: Tinted: SS Grille: SS Vents:
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18-10-2006, 12:34 PM
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Ride: VZ SV6 A5
Join Date: Oct 2006
Location: Auckland, NZ
Posts: 6
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Hi All
I am new memeber and this is my first post as it is something i have spent some time on.
I have a SV6 with Alloytech 190 and we have tried four different systems that are available here in NZ.
The twin system gave more top end and nice note but was boomy  down at 1500rpm. Ended up making custom (mate works at exhaust place) two into ones out of the cats (2 1/4") that are about 600mm long, then through a single 2 3/4", a small resonator and into a Stainless Steel rear muffler that is made by a company in NZ (Coby) for the GenIV v8.
Final outcome is lots more torque, will now hold 4th from 1250rpm and pull without kicking down (have the 5 speed auto), no boom at all, and when you give it the beans she sounds like a muffled v8, in fact i have de-badged it and even the local holden dealers were asking what it was.
Both definatley freed up the top end and it revs cleaner, got half a car length against a std SV6 at 100kph. Next step to remove the cat's to get a decent note down low and free up some more power. 
Also trying to find a decent CAI, anyone got any suggestions.
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18-10-2006, 12:45 PM
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Ride: Vz Clubsport ls2 A4
Join Date: May 2005
Location: melbourne
Posts: 220
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Check out the HSV Intake thread in here.
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19-10-2006, 01:33 PM
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Donating Member
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Ride: VZ R8 M6
Join Date: Nov 2005
Location: Adelaide Essay
Posts: 1,675
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Ive just recently put mine on catback and sounds pretty sweet. HEaders, Cats, Secondaries, Muffler, Resonator Twin Tip. Has a nice note and is not a drone exhaust like most 6s turn out to be. I guess it being manual helps out for sure.
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Quote:
Originally Posted by Skitz
Go ahead with the SS badges,you will reap the benefits.
I have put SS badges and the kit on my VE Omega and when I go cruising and rev it past the girls.........well what can I say,they have drool running down their face.I chuck a U-turn and they say ''Nice car'' and I say ''It's an SS,jump in''.
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19-10-2006, 11:23 PM
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Ride: Vz Clubsport ls2 A4
Join Date: May 2005
Location: melbourne
Posts: 220
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Quote:
Originally Posted by highendrev
Ive just recently put mine on catback and sounds pretty sweet. HEaders, Cats, Secondaries, Muffler, Resonator Twin Tip. Has a nice note and is not a drone exhaust like most 6s turn out to be. I guess it being manual helps out for sure.
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Here ya go a new system out from HM Headers they sent this reply back to me.
We have designed a header for the Alloytec motor which we will be producing very soon, it is a HM112SS which is a stainless steel header which will bolt up to your existing catalytic convertors or into our hi-flow cats which have a 2 1/8” outlet as we found that was the best size for the engine. With our headers and cats we gained approx 35nm low down in the rev range where its needed the most.
We also have a dual 2 1/8” exhaust system already on the market - HM112DS
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20-10-2006, 11:06 AM
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Ride: VZS-Ute06
Join Date: Aug 2006
Location: Melbourne
Posts: 71
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Spoke to HM Headers this morning they will have them available end of Nov 06'
Just have to wait a little longer
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VZ-Rob
98 Ron Powerchip: CAI: SuperLows: GTS Swaybars: Tinted: SS Grille: SS Vents:
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20-10-2006, 11:16 AM
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Donating Member
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Ride: VZ R8 M6
Join Date: Nov 2005
Location: Adelaide Essay
Posts: 1,675
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Quote:
Originally Posted by VZ-Rob
Spoke to HM Headers this morning they will have them available end of Nov 06'
Just have to wait a little longer |
Who and Where are HM Headers
__________________
Quote:
Originally Posted by Skitz
Go ahead with the SS badges,you will reap the benefits.
I have put SS badges and the kit on my VE Omega and when I go cruising and rev it past the girls.........well what can I say,they have drool running down their face.I chuck a U-turn and they say ''Nice car'' and I say ''It's an SS,jump in''.
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20-10-2006, 12:58 PM
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Ride: VZ SV6 A5
Join Date: Oct 2006
Location: Auckland, NZ
Posts: 6
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I have just priced the Genie stainless steel ones, and have been told to drop the cats all together as our laws here allow it and my exhaust guy tells me the oxy sensors are self heating so will be ok. Apparently the genies are good for 10-15kW (not exactly sure on tourque gains) depending of course on other mods as we know.
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20-10-2006, 01:18 PM
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Ride: Vz Clubsport ls2 A4
Join Date: May 2005
Location: melbourne
Posts: 220
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Quote:
Originally Posted by highendrev
Who and Where are HM Headers
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How is it going highendrev,HM Headers do the HSV Exhaust sytems for them,and they are in Hallam a suburb over here in Melbourne.
The HM Headers dual 2 1/8” exhaust system i enquired about the price and $900 fitted,comes as stainless steel with stainless steel tips of coarse.
Also Rob is right the S/Steel headers and hi-flo cats from HM Headers available soon. 
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20-10-2006, 01:24 PM
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Donating Member
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Ride: VZ R8 M6
Join Date: Nov 2005
Location: Adelaide Essay
Posts: 1,675
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Quote:
Originally Posted by brettsv6
How is it going highendrev,HM Headers do the HSV Exhaust sytems for them,and they are in Hallam a suburb over here in Melbourne.
The HM Headers dual 2 1/8” exhaust system i enquired about the price and $900 fitted,comes as stainless steel with stainless steel tips of coarse.
Also Rob is right the S/Steel headers and hi-flo cats from HM Headers available soon. |
Hi Brettsv6, thanks for the info mate. What makes these so good? Are there not any headers available other than these for the Alloytek190?> I may have to ship some over....
__________________
Quote:
Originally Posted by Skitz
Go ahead with the SS badges,you will reap the benefits.
I have put SS badges and the kit on my VE Omega and when I go cruising and rev it past the girls.........well what can I say,they have drool running down their face.I chuck a U-turn and they say ''Nice car'' and I say ''It's an SS,jump in''.
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20-10-2006, 01:48 PM
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Ride: Vz Clubsport ls2 A4
Join Date: May 2005
Location: melbourne
Posts: 220
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Quote:
Originally Posted by highendrev
Hi Brettsv6, thanks for the info mate. What makes these so good? Are there not any headers available other than these for the Alloytek190?> I may have to ship some over....
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Well for starters they are s/steel .
Some guys have put on there SV6s' dual 2 1/5"and gained a lot of power up top and lost torque down low because of this.Thats all good for the strip but on the street were do you need the power most for everyday driving.
We all know there is only 340nm at 3200rpm,but if you can increase that to 375nm at 3200rpm the same as a stock Super v6,wouldn't it be better.Thats' just my opinion some people prefer the dual 2 1/5".
Me i'm going to get DIFILIPPO PERFORMANCE EXHAUSTS' to make a dual 2.1/4in s/steel and hi-flow cats and Pacemakers' with HPC coated. 
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22-10-2006, 07:01 PM
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