For those looking to maximize high boost pressure/high RPM performance in a 400 HP bolt-on platform, the WRX/STi TD06H-18G is for you. Utilizing a TD06 18G compressor wheel in a true TD06 compressor housing for maximum compressor efficiency, the TD06H-18G substitutes the larger TD06H high flow turbine in place of the TD05H turbine to maximize high RPM/high boost pressure exhaust flow while maintaining good throttle response.

Standard wastegate actuator is calibrated at 9 PSI and optional upgrade actuators are available in incremental pressures from 10 PSI to 19 PSI. A ported turbine housing is necessary to maintain proper boost control on the TD06H-18G and is included in the price of the turbo.

The TD06H-18G is shipped complete with coolant pipes and turbo oil drain tube installed and requires no modification to intake, exhaust, oil and coolant connections for installation.