Volant Universal Pro5 Air Filter - 7.5in x 4.75in x 5.0in w/ 6.0in Flange ID Valve Cover This significantly reduces the transfer

This  significantly reduces the transfer of heat from the head to the intake and incoming air giving you more power

maximum size 36mm (1

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Perrin Pro Electronic Boost Control Solenoid 08-14 Subaru WRX

Volant Universal Pro5 Air Filter - 7.5in x 4.75in x 5.0in w/ 6.0in Flange ID Valve Cover This significantly reduces the transferPRO 5 Filters: Volants high performance 5 layer air filters are made of the highest quality textiles, pleated between a top and bottom aluminum screen. Each filter comes pre oiled and ready for use. This design will allow the highest air flow rate possible and a very long filter life. Use Volants two stage cleaning kit to thoroughly clean and re oil the filter. We recommend cleaning the Pro filter only when very dirty or when you reach around 12,000