Perrin Recirculating BOV WRX (2015-2018) Ford The TurboXS 'Stealthback' is available

The TurboXS 'Stealthback' is available both with and without a high-flow catalytic converter

This 24mm adjustable sway bar from Whiteline for the Subaru WRX / STI allows trimming of oversteer/understeer through varying the sway bars ability to resist weight transfer via increasing or decreasing the effective arm length of the sway bars mounting position

hassle-free installation

none seem to work as well as the multi-layer steel OEM style gaskets

Perrin Recirculating BOV WRX (2015-2018) Ford The TurboXS 'Stealthback' is availableAdd horsepower, quicker response, and reliability with the Perrin BOV for your 2015+ WRX. A must have replacement for the leaky, slow responding, and 2015+ Subaru WRX plastic OEM blow off valve. During testing, it was determined that until approximately 3 psi of boost is reached, the OEM blow off valve does not seal. This leads to a loss in horsepower and slower response from your turbo. The PERRIN Blow Off Valve solves this problem with a proper seal