KyleH

iTrader: (1)

I've been putting together my "wish list" for what's next on the build out of my GS. A single turbo, of course is on that list. But I'm not finding any good options for downpipes specifically for the 2nd gen GS / JZS161 platform running a single turbo setup. I'm wondering if anyone has any recommendations / ideas on where to source them and if there are any produced or if everyone is just going custom exhaust from the turbo to the cat-back exhaust?

EDIT: Can someone confirm that the downpipes for supras WILL NOT work for us? Also, I'm really after a 3.5" size... not that it would have much relevance if there's literally nothing out there for our cars that are running on the 2JZGTE-VVTI with a single...

99 GS3

iTrader: (14)

supra's do not work as a bolt-on.

That being said, I usually just buy supra down and mid pipes and use them on these swaps. The down pipe is very close, the connection just needs to be cut and reangled at the bottom, and the mid pipe is just too short so you need to add about 8" or so of straight pipe to it on the back end to reach the stock y-pipe location and also need to reangle the connection to the turbo downpipe.

The shape and routing is very close, so it's alot faster to modify the mkiv pipes than it is to make new ones from scratch. 3", 3.5", and 4" all fit fine on a single turbo GS setup, there is plenty of room. The 4" you just have more precise on your angling so it doesn't rub underneath and to keep enough distance off your heat core hoses.

It's easy enough for anyone that does exhaust work.

TrueGS300

This is a perfect fitting setup specifically for the GS. It's on my possibilities list. Right now I'm working on my cam swap though. NA-T later down the line.

https://www.ebay.com/itm/163653092676

EDIT: I cant tell if you have a GS300 or an Aristo with a GTE engine. you mentioned Aristo, then GS.. This is for a GE engine obviously..

TrueGS300

And here is for a GTE swap into a GS300...

https://www.ebay.com/itm/CXRacing-3-...ry!92028!US!-1

KyleH

iTrader: (1)

Thanks - but unfortunately that will not work for a single. And yes I could have been more clear. I have a GS300 with an Aristo GTE swap.

Encouraging to hear that the Supra parts are a pretty close fit. Just bummed about buying high-end stuff and still having to rework it. I guess it's still cheaper than fabbing it from scratch... Seems there really aren't any shops that sell a direct bolt on. That's a little surprising - would think there would be some Japan vendors that offer such a solution, but maybe big single swaps aren't as popular over there on the Aristo...

99 GS3

iTrader: (14)

Those are to connect to a stock NA gs300 exhaust system.

Kyle already is already GTE swapped with an aristo midpipe and aftermarket catback.

You want to get rid of the stock 2-into-1 midpipe that those adapter pipes bolt onto anyway, that configuration is just causing turbulence by splitting the flow then recombining it again.

The only use for those pipes is if the importer didn't include the aristo midpipe with the swap and you don't want to take the car to an exhaust shop to make a connector pipe. You are going to throw it away once you try to make any power down the road, so just more money wasted, especially since they want $238 for that pipe which is pretty ridiculous.

badblackgs

iTrader: (1)

i have a 2002 gs430 with the aristo swap and i bought my down pipe directly from cxracing and it fit perfectly. they are aware that the jdm twins have a different flange. just need to let them know before you order. its that easy.

KyleH

iTrader: (1)

Unless I don't know something you do, I don't expect that downpipe would work for a single turbo setup. I did consider it for the twins but didn't want to buy a throwaway downpipe knowing I'd be upgrading later.