Perrin Blow-Thru Boost Tube Subaru WRX STI 02-07

PERRIN Front Mount Intercooler users can now get a more accurate charge temperature reading and run a VTA BOV with no problems! Instead of measuring the Mass Air Flow (MAF) and air temperature before the turbocharger, the PERRIN Performance Blow-Thru boost tube moves the mass airflow sensor to the boost tube before the throttle body. The placement of this does many good things like allowing your ECU to read the actual charge temp the engine sees, which eliminates any need for a Cold air intake. A Vent to Atmosphere Blow off valve will be required for the car to run correctly without running rich between shifts, or without idle problems.

The Blow-Thru boost tube also is designed with the Big MAF Intake in mind. Tuners around the world are familiar with this larger than stock MAF housing. This allows for the stock ECU to read more air flow, in turn allowing the tuner to tune beyond 550WHP! This also means the Blow-Thru boost tube needs to be tuned after installed. This part will not function correctly when installed on a stock tuned ECU.

Available in Polished, Black or Wrinkle Red. Please select below.

NOTE: This tube can only be used with PERRIN Front Mount Intercoolers.