Aluminium large plenum intake manifold for the NC MX5. This manifold replaces the original intake manifold on either the 1.8 or the 2.0 version of the MX5. It is an ideal upgrade for any boosted car to prevent the original plastic manifold from splitting. It will increase the power output and improve the sound and drivability of the car. The original manifold is a compromised design which incorporates flaps inside that actuate to give both long runners and short runners.
eBay