Close out your lower rear
bumper and add rear downforce
Our Rear Diffuser is race-bred and functional, but also perfectly
at home on a street car. As with all of our
professional-quality carbon, this piece bagged and autoclaved to
be extremely strong and light.
Extends all the way forward to the factory rear fuel evap box,
which provides the axle-back flat floor from the factory.
Attaches to stock bumper trim mounting points. Requires
slight modification of fuel evap box and reversible modification to
For use with BimmerWorld E46 M3 Exhaust line (Diffuser Exit
variant only) - this exhaust section is designed specifically
for use with this diffuser - diffuser does not work with any
exhaust section using the standard left cutout in the stock factory
is currently empty