BMW uses the same intake manifold for all M52 engines. The displacement of these engines ranges from 2.0 liter to 3.2 liter. Although the smaller intake ports of the stock unit offer respectable low end torque, the top end performance on the larger displacement engines suffers greatly. This is in reference to any of the engines over 2.5 liter, or engines with performance modifications. The stock manifolds simply do not flow adequate air volume at engine speeds over 4000 R.P.M.
Schrick GMBH, well known for their high performance camshafts, has developed an intake system that retains the important low-end torque qualities of the factory system, while increasing the port diameter to improve top end horse-power. Dyno tests on a 328i have shown an increase of 18.8 S.A.E. horsepower between 5600 and 5900 R.P.M. These tests were performed without camshaft or chip modification. The 2-part manifold design permits access to the back side of each intake runner for additional modifications. For use on the following models.
1996-1999 (E36, E39, Z3)
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