Exhaust Manifolds.

[MyEclipse5]

Are the manual and Automatic exhaust manifolds on a 1G the same size?

 

[99gst_racer]

Are the manual and Automatic exhaust manifolds on a 1G the same size?

No, the autos have a much smaller collecter hole. The 1G manual mani's arent much to brag about either. Ported 2G rules. I'll see if I can find a pic that I have comparing a semi-ported 2G vs. a stock 1G auto manifold.

 

[L0G1C]

Yeah, I just found this out last weekend. I have a 1gb Talon TSi with an auto and I got a manifold off a 95 GSX manual. The 13b's collector is much smaller and it's also offset. It's not in the center of the manifold-to-turbo mount. If you are going to upgrade your 1g exhaust manifold and it's an auto, plan on upgrading your turbo, too. Otherwise it will be an exercise in futility. While your at it, you may as well upgrade your studs, too. And don't forget a gasket.

 

[MyEclipse5]

Yeah, I just found this out last weekend. I have a 1gb Talon TSi with an auto and I got a manifold off a 95 GSX manual. The 13b's collector is much smaller and it's also offset. It's not in the center of the manifold-to-turbo mount. If you are going to upgrade your 1g exhaust manifold and it's an auto, plan on upgrading your turbo, too. Otherwise it will be an exercise in futility. While your at it, you may as well upgrade your studs, too. And don't forget a gasket.

I have a manual.

 

[99gst_racer]

Here's that pic I was talking about.
Left=slightly ported 2G....................Right=stock 1G auto

It would be considered downgrading for any DSM to switch to using a 1G auto manifold.

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[jasoncitrano]

yeah i totally agree the 1g auto manifold is complete and utter garbage.

I upgraded to EVOIII manifold turbo and o2 housing and the difference was night and day!