04-07 STI IAG 900 Closed DeckLong Block Engine w/ Stage 4 Heads & GSC S2 Cams

RallySport Direct now carries highly sought-after high-performance upgrades and accessories brought to you by IAG Performance.

On this page, you are looking at the IAG 900 Long Block.

This package is a complete, valve cover to valve cover, crate engine. It is the perfrect option for ease of installation and gives you a premier "drop in" engine. This kit will support up to 900BHP applications. IAG's break-in instructions MUST be followed and the package must be professionally installed for the 12 month / 12k mile warranty to be applicable. All IAG Short Blocks are balanced and blueprinted.

IAG Magnum 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 head gaskets required
• Head Studs - Machine Case for 14mm head studs
• Pistons - IAG-Spec JE FSR 99.75mm 2618 Forged Pistons, Electroless Nickel Plated Tops & Ring area, Ring Set, .250" / .906" H13 Wrist Pins, Clips, (Perfect Skirt Coating and Offset Wrist Pins)
• Connecting Rods - IAG-Spec Tuff H-Beam +2mm / ARP 625+ Rod Bolts.
• Rod / Main Bearings - ACL or King Race bearings.
• Crankshaft - Standard New Subaru Nitride Treated 2017+ STI Crankshaft.
• Case / Main Bolts – Standard FHI Subaru case bolts.

• Stage 4 Heads:
• Heads - Brand New Subaru OEM WRX STI Cylinder Head Castings
• Machine Porting - CNC Ported Intake and Exhaust Runners
• Intake Valves - GSC 37mm (+1mm) Intake Valves
• Exhaust Valves - GSC 33mm (+1mm) SuperAlloy Exhaust Valves
• Springs / Retainers - GSC Beehive Valve Springs & Retainers
• Guides - GSC Maganese Valve Guides
• Valve Seals - GSC Valve Stem Seals
• Lifters - OEM Lifter Buckets
• Camshafts - GSC Stage 2 or Stage 3 Billet Camshafts
• Multi-Angle Valve Job
• Machined Cam Lobe Clearance
• Drilled For 14mm Heads Studs
• Resurface
• Ultrasonic Cleaning
• Final Lash

• Gaskets, Hardware & Accessories:
• Head Studs - IAG / ARP 14mm Set
• Head Gaskets - IAG Fire-Lock
• Valve Cover Gaskets - OEM
• Cam Seals - OEM
• Valve Covers - OEM
• Wrist Pin Seal, Rear Main Seal & Separator Kit
• Crankshaft Woodruff Key

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