IAG Fire-Lock Head Gasket Pair EJ20 93.5mm Bore .051" Thickness w/ 14mm Head Studs 02-05 WRX

The IAG Performance Fire-Lock head gasket solution was developed after extensive research and testing to prevent head gasket failure on high-horsepower, high-boost Subaru EJ Series engines. Inspired by diesel technology, this system incorporates a counterbore step machined around each cylinder bore, allowing specially sized fire rings to seat precisely into the machined areas and head gasket bores. These fire rings are engineered to create a reliable compression seal once the cylinder heads are installed and torqued.

IAG fire rings are manufactured from a proprietary alloy to extremely strict tolerances and undergo a heat treatment process to maximize strength and durability. The gaskets themselves are made from an asbestos-free composite material and feature silicone-based beading applied to critical areas to improve sealing around all water and oil passages. The combination of the precision alloy fire rings and the high-quality gaskets ensures maximum sealing performance for turbocharged Subaru EJ20 engines, providing peace of mind under extreme boost and high-power conditions.

Features:

• Composite Material
• IAG-Spec Alloy Ring
• Specifically designed for 14mm Head Studs
• Silicone Beading
• 93.50mm Bore
• .051" Thickness
• Intended for High Horsepower, High Boost applications
• IAG ARP 14mm Head Studs Required
  

Notes:

• The IAG Fire-Lock gaskets require machine work for installation and are recommended for use with 14mm head stud hardware.
  
• The gaskets are sold in pairs with four Fire-Lock rings.

Install Notes:

1. If a block or cylinder head was previously o-ringed the groove must be filled and resurfaced before using this type of gasket.
2. These gaskets require IAG ARP 14mm head studs to achieve the required torque necessary for proper installation.
3. Due to the required torque, any block that was previously honed will need to go to the next size overbore.
4.  Future servicing will require cylinder head resurfacing due to an imprint left from the Fire-lock rings.