Hey guys, I was thinking about getting the S&S Headers soon and was wondering if I could install that with the stock exhaust? Are there any downsides to it, any problems I might run into? I'm obviously planning on putting on an exhaust a little later down the road but I wanted to see if i could do it one piece at a time since money doesn't fall off the trees ... Is it better to do headers, then exhaust ... Or exhaust, then headers? Both at same time? O yea and I would be changing the Y-pipe to an x-pipe ... Start throwing suggestions at me

-Thanks

 

are you sure

You can do ether or all at once.

 

I'd do exhaust, then header..

 

After having done both I would do the headers first! It will just force the air out of the stock exhaust! You should not have any problems with them bolting up to stock exhaust!

 

The OEM exhaust manifold is more restrictive than the rest of the exhaust. You'll gain more by doing exhaust first. But in the end, they go hand in hand so it's nice if you can do both.

 

Actually, the stock exhaust works surprisingly well. I have a hard time recommending replacing it at all.

Do the headers FIRST. You really do not need to replace the rest of the exhaust unless you want it louder. The S&S are a direct bolt in design and other than extending the O2 sensor wires on some models should not require any other changes.

BTW, the 430 manifolds are more restrictive than the stock GS400 manifolds and of course the engine is bigger. Even more reason to replace them.

 

whoop! i meant to say exhaust manifold, not exhaust itself

I'll be getting headers in the near future. Should come in handy for my future project

 

I won't hurt if you do headers first. It is more labor intensive to do than the rest of the exhaust. And like jbrady said, it works suprisingly well with the stock exhaust.
Btw, here is a pic of my set up. S&S headers, custom X pipe and Carson Tuned mufflers. Enjoy!

 

While on the subject of header and exhaust, anyone know a shop to install the JPI header?

 

you're in socal ToySoarer, check out XS Engineering.

 

Any shop can basically do it. Putting in aftermarket header is just like putting in an OEM exhaust manifold. However, i believe JPI said some pipe needs to be extended because the header is a bit short.

 

Just curious....how much do the S&S headers run for a GS300?

 

if you want more bang for your buck, go with the header first.

as far a know, S&S is only for the V8's

 

But some shops charge more than others

 

ToyoSoarer has a GS300 with JPI headers Some pipe needs to be extended for his setup. S&S on the V8s is no problem