The factory intake manifold on a 2G DSM. This is where the air enters the cylinder head. It has a MDP sensor on the top, which can be swapped out for a MAP sensor when running a SD setup. There are several differences between this intake manifold and a 1G intake manifold. The 2G intake manifold flows better and provides a more direct delivery to the cylinder head than a 1G manifold, but it does flow less due to the smaller ports. The smaller runners and smaller ports on the 2G intake manifold/head make for more velocity which in turn provides better low end torque than a more open manifold and head. By porting the intake runners and also the ports on the head you can get a little more top end out of this manifold, but it is said that after 6500 RPMs you will see power loss because of how restrictive this manifold is. There is a few upgrade options available to 2G owners. The first being the EVO III intake manifold. The ports match up and the manifold flows alot better than the factory 2G unit. Another options is an aftermerket manifold. It is recommended that any turbo bigger than a 16G be run with an after market intake manifold. Otherwise you are only limiting yourself. The 2G intake manifold will in fact bolt up to a 1G cylinder head, but the ports will not seal correctly leaving a gap. Which is basically like driving without an intercooler pipe connected. In order to use a 1G intake manifold, you will either need to port the 2G cylinder head to match the 1G ports, or swap to a 1G cylinder head.
- 52mm inlet