Details
IAG Performance Stage 4 Tuff Ej25 Closed Deck Case W/Plugs, 14Mm Hsm. Fire-Lock, (No Bore/Hone) (2002-2021 Subaru Impreza, Subaru WRX STI, Subaru Forester, Subaru Legacy) - IAG-ENG-1825
IAG Stage 4 Tuff Closed Deck EJ25 converted case halves are the most cost-effective short block modification for high horsepower Subaru WRX and STIs. IAG machines the case halves assembled together in our Haas VF-4SS CNC mill to accept the IAG CLOSED Deck Inserts that transform the block into a solid deck. The unique inserts feature small passages that allow needed coolant flow to the deck surface. The case halves are then CNC machined for our new Fire-Lock head gasket solution that is loosely derived from diesel technology where a counterbore step is machined around each cylinder bore allowing specially sized fire rings to drop into the machined area and head gasket bores. The Stage 4 Tuff case is then drilled and tapped to accept 14mm head studs that combined with the IAG Fire-Lock head gasket set greatly reduces head gasket failure during high cylinder pressure scenarios. IAG's Closed Deck is suitable for street or race use and has been tested in vehicles producing 1000+ horsepower and over 55psi of boost.
IAG's Stage 4 Closed Deck is suitable for street or race use.; Designed for those wanting to assemble their own engine
IAG (Integrity Auto Group) was established in 2004, initially selling high quality used performance cars. Within a year and a half, IAG sold over 200 Subaru WRX / STI?s. Our clients began requesting us to provide performance products and services for their Subaru?s, which we quickly catered to. IAG extended these services and parts nationally by 2007. Fast forward to 2021, IAG Performance is known as a leader in the automotive performance industry (specifically Subaru) and carries an impeccable reputation among our clients and peers.
