08-19 STI IAG 900 Long Block Engine Closed Deck w/ Stage 4 Heads & GSC S2 Cams

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

This is the IAG 900 Long Block.

This package is a complete, valve cover to valve cover, crate engine. It is the perfect 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.

900 CLOSED DECK LONG BLOCK INCLUDES:

• Case Halves: Converted to closed deck from brand new OEM Subaru case halves that are bored and honed to 99.75mm 
• Fire Lock - IAG Fire-Lock receiver groove machining, the latest solution to prevent head gasket failure on high horsepower and high boost Subarus
• Machined casings for 14mm head studs
• IAG Pec JE FSR 99.75mm 2618 forged pistons, electroless nickel-plated tops and ring area, ring set, .250" / .906" H13 wrist pins and clips
• IAG-Spec Tuff H-Beam +2mm connecting rods with ARP 625+ rod bolts
• ACL or King Race rod and main bearings
• Standard new Subaru nitride treated 2017+ STI crankshaft

STAGE 4 HEADS:

• Brand new Subaru OEM WRX/STI cylinder head castings
• CNC machine ported intake and exhaust runners
• GSC 37mm (+1mm) intake valves
• GSC 33mm (+1mm) SuperAlloy exhaust valves
• GGSC beehive valve springs and retainers
• GSC Manganese valve guides
• GSC valve stem seals
• OEM lifter buckets
• GSC Stage 2 billet camshafts
• Multi-angle valve job
• Machined cam lobe clearance
• Drilled for 14mm head studs
• Resurfaced
• Ultrasonix cleaning
• Final lash

more LONG BLOCKS

GASKETS AND HARDWARE:

• IAG / ARP 14mm head studs
• IAG Fire-Lock head gaskets
• OEM valve cover gaskets
• OEM cam seals
• OEM valve covers
• Wrist pin seal, rear main seal, and separator kit
• Crankshaft woodruff key