Description
Product Fitment:
2002-2005 Subaru WRX
Engineered for high horsepower and extreme boost pressures, the IAG Fire-Lock Head Gasket System is a purpose-built sealing solution for EJ20 Subaru engines pushing the limits of performance.
Features:
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Developed through years of R&D to combat head gasket failures in extreme builds
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Utilizes machined counterbore technology with proprietary alloy fire rings
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Fire rings create a compression seal when torqued, preventing head lift and gasket failure
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Ideal for engines using 14mm head studs and high cylinder pressures
Specs:
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Gaskets made from asbestos-free composite material
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Features silicone beading around oil and coolant passages for enhanced sealing
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Fire rings crafted from an IAG-specific heat-treated alloy for maximum durability
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93.5mm bore with .051″ thickness for precise fitment and performance
Required Components & Fitment:
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Requires use of IAG ARP 14mm head studs for proper torque and sealing
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Gaskets are sold in pairs, includes (4) Fire-Lock rings
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Designed for high-boost, high-compression, and track-ready EJ20 builds
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Machine work required: counterbore must be machined into block deck surface
Installation Notes:
Any previously o-ringed blocks or heads must be filled and resurfaced
Fire-Lock gaskets require substantial clamping force; only compatible with 14mm head stud systems
Blocks previously honed may need to be overbored to the next size
Head resurfacing required during future servicing due to ring impressions
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