The FP Green HTA turbocharger is a direct WRX/STI bolt-on upgrade that exhibits an incredible 400-450whp power capability while still maintaining exceptional spool response and efficiency. The new FP Green HTA features a Hydraulic Turbine Assisted (HTA) compressor technology, allowing the FP Green HTA to operate with less backpressure and lower compressor outlet temperatures to maximize low and mid-range rpm boost response. This means that the FP Green HTA compressor is capable of pushing a max volume of 56lb/min while still spooling just as fast as the former 49lb/min standard FP Green. The FP Green HTA hotside is comprised of a 8cm exhaust housing utilizing a 14.5psi wastegate actuator and 34mm wastegate flapper. The FP Green HTA turbocharger is available with either a standard 2.4" compressor inlet or optional 3" housing for those running the large 3" turbo inlet systems. Please note that a 3" inlet requires removal of the tumble generator valve assemblies for proper fitment.

On a 2005 STI with identical fueling and supporting modifications, the FP Green HTA will has been tested to show gains of up to 30 mid-range wheel horsepower and torque when compared back to back with the standard FP Green turbo, all while showing nearly identical spool and boost response. Tuned to 21psi on pump gas, the FP Green HPA will yield peak horsepower in the 350-380 range on a 2.5 liter Subaru. With more boost and race fuel, the FP Green HTA is well capable of 400-450 wheel horsepower.