Here you go bud GS400, 430 same thing: https://www.clublexus.com/forums/sho...hlight=headers have fun...

 

will the IS300 headers fit the gs300? the y-pipe i guess is the issue?

 

Yes, headers will fit but the Y-pipe will not.

 

i guess the question is can i install the header to a stock y pipe? i have access to a custom header made for the is but don't know how i will get it to install on the y pipe

 

What kind of custom header is this that you talked of? The Mazzuri header that's made by Daniel over at my.is? If that's the one you speak of, then no because his runners merge into the collector part is a 6-1 collector while most of the aftermarket headers have the 6-2 merge collector. What I will do is run a aftermarket header and have all custom piping done all the way back to where the axle backs are. It sounds great.

 

Hey guys,
We do have about 5 set of headers in stock. The price is $250. This is headers and the Y pipe. IMG_0850.jpg?t=1181671898
IMG_0849.jpg?t=1181671959
IMG_0843.jpg?t=1181672033
JPI

 

Anybody know if we can get these for less than their price of $600 on their website? Also, what makes these headers better than the other headers out there? Do they really make those gains or are they overhyped?

 

The difference between these headers would be 1 hp or 2.
JPI

 

They claim on their website +24whp and +28wtq on an 01 auto IS300. Would results be similar on a GS3?

 

i wish it was that easy, but no

 

We still have a couple set of headers left. Need to move them out of the shop folks. Give us a call and I will personally ship them out for you
JPI

 

My thanks to JPI and carbong for the headers and the advice to put these on. Looking forward to visiting the muffler shop to have the Y-pipe extended.

 

Not sure where you got the idea that my header is a 6-1 collector, all it would take is for you to look at the picture to know that is not true.

 

I am not sure if the GS300s came with VVTI, if so than on a VVTI the gains will be the same, as for none VVTI I am not sure what the gains will be.

 

Damn man....that's a sweet looking piece there!

PS: Are you ever gonna make a turbo manifold for that price? If so, I'd pay for a quality manifold at around the $600 price point. A lot of the $1000-1500 manifolds are a bit too rich for me lol.