Throttle Body Flow Booster Horsepower for Chevrolet Caprice (1994-1996) 5.7LHigh Flow Throttle Body Air Foil for 1994 1996 Chevrolet Caprice What it Does: Directs incoming air smoothly into the intake manifold to eliminate restrictive turbulence at the throttle plates, improving overall engine volumetric efficiency. The Stock Caprice Airflow Bottleneck The factory GM LT1 throttle body features an abrupt, flat face between the dual bores. This blunt surface creates a stall zone for incoming air, causing parasitic turbulence