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

[426Cuda]

I went with Magnaflow metal cats. They seem fine.

 

[TTubrag]

That’s a good question about cats. Apart from marketing hype and assumptions about pricing, how DO you determine a good quality build and performing catalytic converter, over a rubbish one?

I’d be going 200 or 300 cell cats and length of warranty term would be my best guess on quality without having the opportunity to inspect them. Exhaust and tuner shops will recommend the products they have supply relationships with so their advice is likely biased toward their profit over your satisfaction.

 

[LS1SS]

There is an exhaust shop in Clontarf Qld that advertises on eBay every now and again,he is one of the cheapest and they look good,he does them to bolt up to HSV headers in 100 or 200 cel and also exit end he does them with the very restrictive cone flange or flat flange
The exhaust I tried was std I liked it with fuse pulled,then HSV headers std cats std back not as good a sound,then HSV mid to std cans loud but not a nice mature sound bit tinny at dawdle but WOT sounded real goodthen removed it all and went hurricane
headers 1 3/4 the rest it manta 2 1/2 medium,now that’s a nice note I was looking for.My recommendation is if you want it to look factory don’t change it,if you want it to look close get a set of HSV headers with aftermarket cats HSV mid std cans,if you want good sound go aftermarket exhaust with tune you can’t go wrong,I’m always fiddling with exhaust and one thing I’d like to try is aftermarket exhaust with std cans but can’t find any to experiment with and write up results.

 

[TTubrag]

There is an exhaust shop in Clontarf Qld that advertises on eBay every now and again,he is one of the cheapest and they look good,he does them to bolt up to HSV headers in 100 or 200 cel and also exit end he does them with the very restrictive cone flange or flat flange
The exhaust I tried was std I liked it with fuse pulled,then HSV headers std cats std back not as good a sound,then HSV mid to std cans loud but not a nice mature sound bit tinny at dawdle but WOT sounded real goodthen removed it all and went hurricane
headers 1 3/4 the rest it manta 2 1/2 medium,now that’s a nice note I was looking for.My recommendation is if you want it to look factory don’t change it,if you want it to look close get a set of HSV headers with aftermarket cats HSV mid std cans,if you want good sound go aftermarket exhaust with tune you can’t go wrong,I’m always fiddling with exhaust and one thing I’d like to try is aftermarket exhaust with std cans but can’t find any to experiment with and write up results.

What’s it sound like LS1SS? Got a video you can post?

 

[426Cuda]

That’s a good question about cats. Apart from marketing hype and assumptions about pricing, how DO you determine a good quality build and performing catalytic converter, over a rubbish one?

I’d be going 200 or 300 cell cats and length of warranty term would be my best guess on quality without having the opportunity to inspect them. Exhaust and tuner shops will recommend the products they have supply relationships with so their advice is likely biased toward their profit over your satisfaction.

The main thing is metal, not ceramic. Also size. Bigger entry and exit. Bigger cats sound better, deeper, less tinny.

 

[.05]

There is an exhaust shop in Clontarf Qld that advertises on eBay every now and again,he is one of the cheapest and they look good,he does them to bolt up to HSV headers in 100 or 200 cel and also exit end he does them with the very restrictive cone flange or flat flange
The exhaust I tried was std I liked it with fuse pulled,then HSV headers std cats std back not as good a sound,then HSV mid to std cans loud but not a nice mature sound bit tinny at dawdle but WOT sounded real goodthen removed it all and went hurricane
headers 1 3/4 the rest it manta 2 1/2 medium,now that’s a nice note I was looking for.My recommendation is if you want it to look factory don’t change it,if you want it to look close get a set of HSV headers with aftermarket cats HSV mid std cans,if you want good sound go aftermarket exhaust with tune you can’t go wrong,I’m always fiddling with exhaust and one thing I’d like to try is aftermarket exhaust with std cans but can’t find any to experiment with and write up results.

thanks mate for your time taken to explain info on and fitment and procedure of fitting hsv extractors in this thread
all very helpful info for others and me about to fit extractors at home

cheers mate

 

[Rikster71]

Just wondering, does anyone know what the difference in the bi-modal mufflers are between a VFII Redline and a VF HSV GTS are, just wondering if i buy just a centre pipe and use my cans, or if the HSV Cans would be better again.

 

[Rikster71]

There is an exhaust shop in Clontarf Qld that advertises on eBay every now and again,he is one of the cheapest and they look good,he does them to bolt up to HSV headers in 100 or 200 cel and also exit end he does them with the very restrictive cone flange or flat flange
The exhaust I tried was std I liked it with fuse pulled,then HSV headers std cats std back not as good a sound,then HSV mid to std cans loud but not a nice mature sound bit tinny at dawdle but WOT sounded real goodthen removed it all and went hurricane
headers 1 3/4 the rest it manta 2 1/2 medium,now that’s a nice note I was looking for.My recommendation is if you want it to look factory don’t change it,if you want it to look close get a set of HSV headers with aftermarket cats HSV mid std cans,if you want good sound go aftermarket exhaust with tune you can’t go wrong,I’m always fiddling with exhaust and one thing I’d like to try is aftermarket exhaust with std cans but can’t find any to experiment with and write up results.

Just called him, apparently they are only for VE and he has been told they wont work with VF???????

 

[lmoengnr]

Just called him, apparently they are only for VE and he has been told they wont work with VF???????

They will fit the VF, but you'll need to weld a bung in the exhaust mid section for the rear oxy sensor.
There isn't enough room in the aftermarket cat for the rear oxy sensor.

 

[426Cuda]

Just wondering, does anyone know what the difference in the bi-modal mufflers are between a VFII Redline and a VF HSV GTS are, just wondering if i buy just a centre pipe and use my cans, or if the HSV Cans would be better again.

The HSV cans were louder when I had them on my Redline. But, they don't fit well. One of the tips has a dogleg in it to suit the fake HSV tips that are built into the rear bumper / valance. Better to stick with the Holden rears.