HKS LEGAMAX Premium Exhaust Honda Civic Type-R FK8 IPD Plenum with flexible user-definable axis and

with flexible user-definable axis and 6 fully user definable corrections

25 Flat Top 449 46956-1

Diagnostic Information

Air/Fuel Ratio

As of 12/1/22

HKS LEGAMAX Premium Exhaust Honda Civic Type-R FK8 IPD Plenum with flexible user-definable axis andCode No. 31021 BH003 Overwhelming Low Exhaust Pressure 50 of Original Pressure75 large diameter pipe and full straight structure reduce the exhaust pressure to 50% of the stock. This significant exhaust pressure reduction enables the turbine to run smoothly from low RPM range, which results in the engine output increase in an entire speed range. Also, this pressure reduction effect is enhanced as the tuning level becomes more advanced; the engine