Cosworth 20004539 Air Pump Block Off Plates
Built for the (06-08) Subaru STi... Used to eliminate the air pump and related valves found on 2006-2008 Subaru Engines. Used for high performance applications or adapting later cylinder heads to early engines. Seals off the air injection ports at the cylinder heads. Saves weight, reduces complexity, cleans up engine compartment. Machined from solid aluminum with a "Cosworth blue" anodized finish. Mounting hardware included.
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