The Revo Air Intake System for the Ford Fiesta ST is a high performance upgrade, offering gains in both power and torque over the stock system.
Initial flow testing of the OEM system highlighted its restrictiveness. The route from airbox to turbo varies in diameter and convolutions in the pipe cause turbulence, slowing airflow to the turbo. The OEM airbox performed better than expected however restricted power towards the top end of the rev range, especially when coupled with Revo Software.
The Revo system is currently the only kit that replaces the rear plastic back-pipe with a one-piece 70mm aluminium pipe, mandrel bent to ensure no internal restrictions. Automotive grade silicone couplers connect the system to a Revo 3 stage foam filter with integrated MAF sensor housing for ease of fitment and correct scaling. The kit comes complete with an integrated heat shield that utilises the OEM cold air feed, sectioning off the foam filter from the hot engine bay by sealing itself when the bonnet is closed.
Revo recommend this upgrade for anyone running Stage 2 and Stage 3 software in order to achieve maximum performance, however Stage 1 has also been optimised to work in conjunction with this Air Intake System upgrade and offers a noticeable intake noise.