Performance Increase : 10-14hp, 10-11ft-lb
*Images show our optional carbon engine cover.
The GR86 Intake is a culmination of testing numerous configurations with over 125 dyno runs to arrive at an optimised design. We tested both stock and tuned cars to assess the impact of changing the intake for a less restrictive version. The NA 2.4L Boxer engine is sensitive to intake air temperatures so our initial priority was to ensure a fully sealed system. Dyno testing revealed a dip in power around 6000rpm on the stock ECU. This dip persists no matter what the intake configuration is – even with all possible restrictions removed, a higher flowing intake creates a strong engine resonance at this rpm causing a momentary dip below the stock curve. The stock airbox has a baffling effect at this rpm but then also restricts the power at the top end. By iterating our design through testing different intake lengths, single and dual duct openings and even adding baffles, we arrived at a version which minimises the resonance dip while gaining 14hp at the top end on the stock ECU. Once the ECU is tuned we can see large mid-range gains and an elimination of the dip in power below the stock curve.
Download the Installation Guide here: DOWNLOAD
