BLOW OFF Typ H - Subaru Boxer DIT FA20 FB16

Our turbo blow-off for Subaru Boxer FA20 DIT and FB16 DIT (Legacy, Forester, WRX, Levorg)  valve is made from billet aluminium, this atmospheric valve blows air to atmosphere creating the "Whoosh" sound most commonly associated with rally cars. This increases both quicker throttle response and higher clamping load to maintain boost pressure more reliably.

Blow off is direct replacement of stock diverter valve (oem part number: K005T08371, 14471AA250 and other compatible).

(please mind this is high quality product made in Poland EU not cheap cast from China)

Twin piston construction of our blow-off valve  allows to use this with most cars with MAF sensor where single pistons valves can cause ECU errors.

Blow off valve is supplied with two valve springs - a soft spring and a hard spring.
The soft spring is already installed in the valve and will be perfect for 90% of applications.
The harder spring is supplied separately for self-installation, is designed for higher than stock boost level.

This turbo blow-off valve is dedicted for: 

Subaru Boxer FA20 DIT, FB16 DIT engine (Legacy, Forester, WRX, Levorg)

Kit contains two set of blow-off springs for different boost levels and also contanins blanking plate for stock DV valve.

Note: We recommend installation of the valve by a specialized company. Blow off is dedicated to track use and sports cars. The blow-off valve, installed instead of the stock DV valve, may cause a check engine error. If this occurs, remap should be performed to adjust ECU to change done in the intake setup (disable check engine errors permanently).

ProPerfekt is polish company produces high quality aluminium CNC machined race parts blow off valves, MBC, blanking plates, diverter valves, adapters, pulleys, swirl pots, catch tanks etc.

All parts are for Subaru Impreza Blow-off manufactured and designed in Poland.

We ship worldwide! Our online shop is always at your service!