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Commonly known performance issues with OEM Honda/Acura distributor igniters at higher power levels cause many people to convert to more reliable COP (coil on plug) style ignition systems
Honda / Acura B/D Series
Material : Alloy Aluminum
Fits ALL 4
Performance Cylinder 4 Coolant Mod for Subaru WRX STI EJ20/EJ25 Engines m1 Commonly known performance issues withDescription 100% Brand New Color: BLACK Cylinder 4 Coolant Mod for Subaru EJ Engines was designed to increase coolant flow to cylinder #4 head area. The additional coolant flow helps reduce cylinder #4 coolant temps and keeps the temps more uniform with the rest of the cylinders. This helps reduce knock and detonation in cylinder #4, which is known to cause the dreaded EJ ringland failure Compatible with All EJ20 EJ25 engines 2002 2014 Subaru WRX 2004