These carbon fibre air diversion plates ensure your radiator is recieving maximum air flow to aid in cooling. Not only do they help to reduce engine temps on modified or track / compeition cars, they also look good too! This particular model is designed for the Subaru WRX GDBF.
Note: Image for illustration purposes only.

Kinugawa Japan TD04HL-20T GTX Legacy BP5 / BL5 twin scroll upgrade turbo
BC Camshafts B16a B18c stage 2 / 2+ / 3
Radiator Cap Cover - Violence
BC Camshafts EJ20 stage 2 / 3 