LS Exhaust Comparison Gold! HSV Headers vs Aftermarket Tri-Y's & 4-1's. What would you choose?

[abuch47]

Yeah got 7 months of warranty left so HSV for a bit then go bananas. Gives me time to save up for projects too.

 

[Mattricho]

Just a quick question
Is there a set of 4into1 headers and cats to fit the factory cat back??

 

[TTubrag]

I think I have to agree with some of the comments above... the 2nd hand HSV alternatives represent good value, streetable performance and exhaust note improvements over the stock LS3 system... IF you can get the parts at a reasonable price.

Catch is... those HSV bits are getting increasingly more expensive and/or difficult to find, which makes the alternative to just do it once, and do it properly the first time with aftermarket kit, more appealing and less expensive in the long run if you think you'll eventually end up with an aftermarket exhaust system anyhow.

 

[daves8]

Just a quick question
Is there a set of 4into1 headers and cats to fit the factory cat back??

Yes, REX 4-1 headers from GM Motorsport. They are all equal length primaries.

I have them, they flow and sound great.

 

[[paradox]]

Just a quick question
Is there a set of 4into1 headers and cats to fit the factory cat back??

i think theres quite a few short 4into1s, if you are talking long tube then i think these are your only option
https://www.gmmotorsport.com.au/categories/Exhausts/REX-%2d-Ramjet-Exhaust/Headers-and-Cats/

 

[VS 5.0]

those HSV bits are getting increasingly more expensive and/or difficult to find,

This.

Certainly don't see parts / systems at the prices @426Cuda paid over here.

 

[Murdoch]

I would agree. But cost has to be a factor for some. The HSV setup has always been a good low cost option which won't cause any warranty issues. Looks OEM and doesn't require a tune. That's why they're gold. Not because they're the best out there.

correct.
That's why I did it to my first wagon.
Mostly looks and so Holden did not get funny when went into servicing. Warranty issues I mean.
They did not really care in the end.

The 340 KW headers are very hard to find in Adelaide.
I was just lucky to see someone advertise HSV headers and they did not realise that they were the 340 ones....
I should have taken them off when I sold the car and doubled my money.

 

[kleanphil]

ive had absolutely no problems with warranty and service's and i've changed/replaced everything that I can , all I get are enquiries to how it goes .

 

[Mattricho]

I’m guessing that with the gmmotorsport 4into1 you need a tune??

Also what are triplestepped pipes?

And what’s the difference between them and the 1 3/4 headers?

 

[Murdoch]

ive had absolutely no problems with warranty and service's and i've changed/replaced everything that I can , all I get are enquiries to how it goes .

yep.
Hindsight is a beautiful thing.

I’m guessing that with the gmmotorsport 4into1 you need a tune??

Also what are triplestepped pipes?

And what’s the difference between them and the 1 3/4 headers?

Re headers, don't reckon cats move so might be alright? Stepped would mean a changing diameter along the length of the header to the collector. Maybe 1 7/8 to 2'?