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AU3 XR8 Headers & Cats 

 

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 Post subject: AU3 XR8 Headers & Cats
Posted: Fri Jun 22, 2007 9:12 am 
Smokin em up
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Age: 35

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Joined: 7th May 2007

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Ride: AU3 XR8

Power: 191 rwkw

Location: Sydney
NSW, Australia

My cars got a cat back exhaust and im looking to get extractors for it but I noticed that the cats and headers that are on there now (which im assuming is standard) are welded together.
Is that normal? I always thought they were just bolted together.
Does that mean that ill have to get both aftermarket headers and cats togehter?

 

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AU3 XR8 Manual, Full options,Pursuit Lip, Boss bonnet, Hurricane extractors, zorst, SS Induction, K&N filter, Flash tuned...191rwkw

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Posted: Fri Jun 22, 2007 2:39 pm 
Getting Side Ways
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Age: 38

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Joined: 14th Jan 2007

Ride: T1 TE50 P01

Location: Perth NoR
WA, Australia

Essentially yes, it is possible to cut the old cats off and re-use them, but a set of hiflow units aren't that much more dollars and unlock a few extra HP. :)

 

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TE50 T1 P01
200kw 5.0L, T5, Koni shocks, King S/Lows, Whiteline swaybars, DBA 4000 rotors, Acron CAI, 80mm Accufab TB, Difillipo headers & cats, twin 2.5" & Aerochambers, 3.91 LSD.

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Long rod 306, TFS 11R 205cc heads, SHP camshaft, 1.72 R/R, ported TFS Box R, 400hp NX SHO kit...

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Posted: Sat Jun 23, 2007 8:35 am 
Smokin em up
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Age: 35

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Ride: AU3 XR8

Power: 191 rwkw

Location: Sydney
NSW, Australia

what about not having the cats and just running the pipe straight through?

 

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AU3 XR8 Manual, Full options,Pursuit Lip, Boss bonnet, Hurricane extractors, zorst, SS Induction, K&N filter, Flash tuned...191rwkw

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Posted: Sat Jun 23, 2007 11:20 am 
Getting Side Ways
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Age: 38

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Joined: 14th Jan 2007

Ride: T1 TE50 P01

Location: Perth NoR
WA, Australia

You could do that too... Just don't get caught by the EPA. ;)

 

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TE50 T1 P01
200kw 5.0L, T5, Koni shocks, King S/Lows, Whiteline swaybars, DBA 4000 rotors, Acron CAI, 80mm Accufab TB, Difillipo headers & cats, twin 2.5" & Aerochambers, 3.91 LSD.

To Come:
Long rod 306, TFS 11R 205cc heads, SHP camshaft, 1.72 R/R, ported TFS Box R, 400hp NX SHO kit...

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Posted: Sat Jun 23, 2007 3:19 pm 
Getting Side Ways
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Ride: 1999 XHII XR8, 2002 AU Fairmont

Power: 236 rwkw

Location: Perth
WA, Australia

DaveXR8 wrote:
what about not having the cats and just running the pipe straight through?


For the miniscule gains that may be made by doing so i wouldnt bother, not worth the $10,000 or so fine.

If you are on a tight budget i would get the pacemakers and have your std cats modified to fit up. They pretty much flow enough anyway, i cant see you getting much of a power gain with hi-flows, not worth the $$$$ in my opinion.

 

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Posted: Sat Jun 23, 2007 9:12 pm 
Smokin em up
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Age: 35

Posts: 212

Joined: 7th May 2007

Gallery: 5 images

Ride: AU3 XR8

Power: 191 rwkw

Location: Sydney
NSW, Australia

yeah i was told that the standard cats are good enough to do the job.

 

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AU3 XR8 Manual, Full options,Pursuit Lip, Boss bonnet, Hurricane extractors, zorst, SS Induction, K&N filter, Flash tuned...191rwkw

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 Post subject: cats
Posted: Sun Jun 24, 2007 12:42 pm 
Oompa Loompa
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Joined: 19th Aug 2006

Location: Adelaide
SA, Australia

another idea is (dare i say it)look around for a couple of vl,s and grab the cats off them they are supposed to flo well and are of a big pipe diameter.
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