Evolution Air Box Kit

Kit includes a BMW Motorsport developed larger air filter box, upgraded air horn, sealing ring and rubber air box support. This kit replaces the original factory intake duct that has three restrictive 90° bends. Note: Most 1991 M3's came equipped with this air intake assembly.

P/N 13711330

Cone type K&N filter which replaces your stock air filter assembly.  Fits all years.

P/N 1371K30M3

Front Spoiler Cover Panels

After installing our Evolution Air Box Kit, the black air intake grill is no longer functional. This grill and the similar tow hook cover produce turbulence and drag. We offer a pair of snap in flush panels to replace the grills for a smoother look and improved aerodynamics. Paint to match. Kit includes left and right panels, clips and retaining straps.

P/N 51111961KIT

P/N 1372332005

Korman Heavy-Duty Air Accumulator Support

The M3 air accumulator (plenum chamber) is supported by a rubber mount which is prone to failure. When this mount breaks, the weight of the accumulator and throttle bodies hangs on the intake manifold, causing a premature intake gasket leak. This is a stronger steel reinforced rubber mount.

P/N 13711E30

Korman Big Bore Throttle Body Kit

We bore the original stock throttle bodies and replace the 46mm throttle plates with 48mm plates. The manifold and air horns are then ported to increase air flow through the entire assembly. Some "tuners" offer larger throttle bodies, but they only machine the round throttle bore end without porting out the bore between the throttle plate and cylinder head.  Our throttle bodies are enlarged all the way through for maximum flow. Modified intake gaskets included, sold on an exchange basis.

P/N 1161048013, CORE P/N 116161CORE

BMW Motorsport Big Bore Throttle Body Kit

Larger diameter intake manifold and a 48mm throttle butterfly give a 9% increase in throttle plate area. Larger aluminum intake air horns and throttle flange gaskets included. These are all new parts (not reworked stock parts) which are cast from larger molds. Sold outright.

P/N 1161048003

Special Intake Gasket for 48mm throttle bodies, above P/N 13541310865