IAG Stage 4 Tuff EJ25 Subaru Closed Deck Short Block cobb tuning The AOS is constructed of

The AOS is constructed of three CNC machined sections that screw together and are sealed with O-rings

thanks to the EBC Redstuff Brake Pads ceramic mixture

Suitable Applications:  GC8A

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The N300X ECU is Designed to suit the VG30DET engine

IAG Stage 4 Tuff EJ25 Subaru Closed Deck Short Block cobb tuning The AOS is constructed ofFor WRX, STi, LGT, FXT Rated for 1000BHP Head Gasket Required: NOT INCLUDED *IAG Fire Lock . 051" Head Gaskets with IAG Spec Alloy Ring Set* PN# IAG ENG 1740 Stage 4 Tuff Closed Deck Includes: Case Halves Converted to Closed Deck using brand new Subaru OEM case halves, bored and honed to 99. 75mm. Fire Lock IAG Fire Lock receiver groove machining, latest solution to prevent head gasket failure on high horsepower and high boost Subaru's *IAG Fire Lock