Enlarged intake manifold, the entrance is increased from the standard 47mm to 54mm. Including big-bore intake pipe. With this a important bottleneck in the intake is deleted with less pressure loss as a result. This manifold is recommended for use with a larger turbo/ high turbo boost. Suitable for the Alfa 147, 156, Fiat Stilo, Marea with euro 3 1.9 8v engine (115 hp).