IAG Performance Fire-Lock FA20 Head Gasket Pair for use w/ 14MM Head Studs 2015-2021 WRX / 2013-2021 BRZ / FRS / GT86 | High-Boost Durability | Head Gasket Set

Overview

The IAG Performance Fire-Lock FA20 Head Gasket Pair is engineered specifically for Subaru FA20 engines found in the 2015-2021 WRX and 2013-2021 BRZ/FRS/GT86 platforms. Designed for high-horsepower and high-boost applications, this head gasket system provides a robust sealing solution to prevent head gasket failure under extreme conditions. It’s ideal for enthusiasts and builders committed to pushing their FA20 engines beyond stock limits while maintaining reliability.

Derived from advanced diesel engine technology, the Fire-Lock system features precision-machined counterbores around each cylinder bore. This allows the proprietary Fire-Lock rings, made from a specialized alloy and heat-treated for strength, to seat securely within the gasket. By isolating combustion chamber sealing from fluid sealing, the design ensures superior durability and consistent compression sealing. This innovative approach sets the Fire-Lock gaskets apart from conventional head gaskets, especially in demanding Subaru builds.

For Subaru owners focused on high-boost tuning or extreme horsepower builds, the Fire-Lock head gaskets offer peace of mind with proven performance beyond 1000 horsepower. When paired with IAG’s 14mm ARP head studs and precision machining services, this system delivers a reliable, long-lasting seal that supports aggressive tuning and track or street performance. It’s a critical upgrade for anyone serious about maximizing the FA20 engine’s potential.

Features & Specifications

This IAG Performance Fire-Lock FA20 Head Gasket Pair is engineered for Subaru WRX and BRZ/FRS/GT86 platforms and features a proprietary Fire-Lock ring system with precision-machined counterbores. Constructed from composite materials with silicone-based beading and IAG-spec alloy rings, it delivers exceptional sealing strength for Subaru enthusiasts seeking high-boost reliability and durability.

• Brand: IAG Performance
• Product: Fire-Lock FA20 Head Gasket Pair for use w/ 14MM Head Studs
• Part Number: IAG-ENG-1755
• Fitment: 2015-2021 Subaru WRX, 2013-2021 BRZ / FRS / GT86
• Material: Composite with Silicone Beading (Gasket), Proprietary Alloy (Fire-Lock Rings)
• Finish: Asbestos-free composite with silicone sealing beads
• Construction: Precision machined counterbore with heat-treated alloy rings
• Origin: Not specified
• Head Stud Size: 14mm (IAG ARP 14mm Head Studs Required)
• Thickness: 0.051"
• Bore Diameter: 86.5mm
• Installation Requirement: Precision machining of cylinder head counterbores required

Key Benefits

• Durability: Proven to withstand over 1000 horsepower and extreme boost pressures without failure
• Sealing Performance: Isolates combustion sealing from fluid sealing for superior reliability
• Precision Engineering: Machined counterbores and heat-treated alloy rings ensure consistent compression seal
• High-Boost Compatibility: Designed specifically for high-horsepower FA20 builds requiring 14mm head studs
• Material Quality: Asbestos-free composite gasket with silicone beading improves oil and coolant sealing
• Platform Specific: Tailored fitment for Subaru WRX and FA20-powered BRZ/FRS/GT86 engines

What's Included

• 2× IAG Fire-Lock 2.0L FA20 Head Gaskets
• 4× Fire-Lock Rings

Installation & Compatibility

Installation of the IAG Fire-Lock Head Gasket Pair requires professional precision machining of the cylinder heads to create the necessary counterbore recesses for the Fire-Lock rings. This machining is critical to the system’s sealing performance and must be performed by IAG or a qualified machine shop. The gaskets also require the use of IAG ARP 14mm head studs, which are not included. Due to the complexity and precision required, professional installation is strongly recommended to ensure proper fitment and sealing integrity. This gasket set is compatible with 2015-2021 Subaru WRX and 2013-2021 BRZ/FRS/GT86 models equipped with FA20 closed deck engine blocks.

• Professional Installation: Recommended
• Modifications Required: Precision machining of cylinder heads, 14mm head studs required
• Verify Compatibility: Confirm fitment for your specific year and model before purchase

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