RPI's ST/GT axle back system for
the E60 BMWs 5 SeriesE46 & E92 M3, 135i, E63 M6 and the Z4
MCoupe/MRoadster are unique and unlike any other exhaust system. With maximum
velocity in mind, our GT system uses a reduction method to maintain
exhaust gas temperatures towards the rear of the exhaust system. This
allows for significant HP and TQ gains throughout the entire power band
during the dyno tests.
Like all RPi exhaust systems, each comes
with a limited lifetime warranty and is 100% made in the United States.
**All names and logos used here are
registered trademarks for their respective companies. We are not
associated with BMW NA or BMW AG or any of its affiliates.
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