By utilizing air column inertia and carefully timed gas dynamic pressure waves, the S&S VFI Tuned Induction systems ram additional air into the cylinders for increased mid-range torque
For maximum tunability and performance gains an S&S Variable Fuel-Injection (VFI) module is recommended (sold separately), but any compatible, programmable module with enough capability and tuning range can be used
Components must be purchased separately to complete a Single-Bore EFI assembly
Made in the U.S.A.
Designed for riders seeking the greatest possible performance gains from their fuel-injected engines