Halltech Ram Air Tunnel Port™ Fiberglass Paint Ready Gelcoat. This is our paintable version of the Halltech Ram Air Tunnel Port™ ready for prep, prime, and paint matching to your C5. We supply an aluminum screen, but you will have to have the paint shop bond it after they finish their painting. This piece has been used for 8 years by many folks that Supercharge or Turbocharge their C5, where cold dense airflow is needed into the engine bay. It also compliments the Halltech C5 Venom by bringing ram air to the filter area. No claim of pressurized airflow is being made, but the colder, denser air allows better timing and better power.