No improvement, it will actually cause a leak, being the 2g ports are smaller than 1g ports. If you change the intake mani you will have to change the head too. Or you can epoxi the runners in the 1g mani to match the 2g head. The only manifold worth the throuble would be a cyclone intake mani with dual runners.


Oh and if you change the throttle body, go with a 1g non turbo TB with the snout, its the biggest oem one you can get and it allows alot more air flow than the stock 2g.

Hope that helps!