Finally, an aftermarket intake manifold that delivers the goods! On back to back testing with one of our high-power cars, we saw peak power rise by more than 30 hp. Even naturally aspirated cars see an improvement.
The manifold has very long runners with well-designed bellmouths to feed hungry cylinders. The walls are fairly thick so you can port to your heart's content. The two-piece design allows you to add a spacer to increase the volume of the plenum. The throttle body opening is 68mm if you want to run a big throttle body, and the flange design allows you to fit this manifold to either NA or NB heads and can use either stock or Skunk2 throttle bodies. It includes a phenolic spacer to prevent heat transfer from the head to the manifold.
Sorry, it won't fit a 1.6. It will fit an NA8 head, but you will need to use an aftermarket fuel rail. We have also had reports of hard interference between short injectors (such as ID 1050s) and the manifold on an NB application. Be prepared to deal with potential fitment problems if you have a lot of non-stock parts. Please note that we cannot ship this product to California as it will not meet emissions regulations.
The 30 hp gain was on back-to-back dyno tests of our 2.0 R&D car with a GT3070 turbo. We used a stock throttle body for both runs, and the VTCS manifold had the butterflies removed.