Starting with the OE BMW body, many diameters were tested before
we found one that gained the best performance while maintaining all
OEM functionality and drivability. Larger, was not always
When looking to extract maximum horsepower from a highly
efficient engine, the entire intake track must be taken into
consideration, and a balance needs to be obtained between all
On the M50 / S50 series of engines, the engine has only one
throttle to ingest large amounts of air. When you want maximum
engine output, this opening must be properly enlarged so the engine
is not 'choked off'.
This is a great place to free up horse power on the inline six.
Many people look at the "Euro" and S54 engines, and feel envy of
their 6-throttles, but with one of our properly sized
single-throttle bodies, you can build just as much horsepower, and
torque figures can be even better!
We offer both Big Bore OBD1 & ODB2 Throttle Bodies to really
unleash the maximum output of your engine. Our throttle bodys are
OEM units that are professionally cleaned, bored to 68mm, and
air-flow transition blended, then equipped with new butterflies for
maximum flow while keeping factory fit and pedal feel.
Each throttle body is smooth in response and user friendly so
its perfect on the street or track. Typically software upgrades are
Bolt on gains in the 5-10hp range, with similar torque gains can
be had. With other performance upgrades like cams or forced
induction, even further WHP can be gained with this
Send in your stock throttle body and
receive a $200 credit!Your
grand total becomes = $499.95
Q: Why would I not use one of your
billet throttle body's? the 70 or 75mmA: We
recommend using our bored OE body's when street drivability is key-
such as daily drivers, and dual use cars that see mostly street
Q: Will I need software?
A: Depends on your
engine configuration. Most customers have not needed to retune,
however some efficient setups that are ingesting serious air and
are on the lean end of their tune may need software
Q: What is installation like?
A: For 95% of
customers, this throttle body will bolt on without issue. However,
the larger butterfly does change the resting position of the
throttle shafts slightly; because of this, and the fact that the
TPS is not adjustable, we will make mention that if your car does
not go back to the idle ECU map after install, that the TPS
mounting may have to be slightly notched to assure that the TPS
voltage output shows that the throttle is 100% closed.
Q: What does this throttle body upgrade cost me in the
A: $499 total...
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