The stock iron headers on the 1st gen 3SGE motor, are pretty good, with the downpipe they are a 4-2-1 design, so it is questionable if an aftermarket header would add much power. Since i have never tried i don't know. Most aftermarket headers are 4-1 design, which may give better top end power, i do know that a 5SFE header will bolt to the head, then you would custom fabricate to the downpipe, hotshot.com makes 5SFE header for 90-93 celica, mr2, I would be curious on how much power it would make, but it is around $400.
HKS and AEM make cam gears for the GE head... Question is, is do you know how to properly tune that engine to benifit from the cam gears...? Get a Apexi SAFC it runs about 150-300 bucks... It will get about 10-15 to the ground properly tuned.. Lets see I Get a Custom CAI, Port your head and intake manifold a lil.. then get a GTE Turbo Manifold and turbo.. Then turbo the sucker You would love it!!!
Yeah, but i need a new tranny too. Because the starter in under the exhaust manifold.DAMN. Already thought of it, but i might be selling it and then getting another celica with a blown motor and putting a 2nd or 3rd gen 3sge into it, or if it comes with a 3sfe, i'll drop a 3sgte into it and make a GT2.LOL
I bought a Pacesetter header for my GTS. Mistakenly ordering it after finding out it's for the GT,I went to install it and it didn't fit. So I cut it,added some piping and made it fit,and let me tell you,it is a night and day difference. The quality is shit,but man,so much more power. Throttle response was immediately better,gas milage improved,torque and hp imporved.
Get a header. Best investment you will make for your car.