Buy 2001 Subaru STI Intercooler. INTER Cooler Complete. Intercooler If your 2001 Subaru STI is Engine, Acceleration - OEM Subaru Part # 21821AA100

INTER COOLER COMPLETE Intercooler

Fits Ascent, Legacy, Outback, WRX

Intercooler
If your 2001 Subaru STI is equipped with a turbo and you've noticed a reduction in acceleration or a hissing on acceleration accompanying your check engine light, your intercooler or its piping/tubes may need to be repaired or replaced.