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CR21 4CYL (24mm - suits models to - 8/1984 excl YR31)
Do not disconnect fittings while pumps are running
Both options fit with the OEM and Scorpion downpipe
The IAG AOS conversion kit for the 2015-16 Subaru WRX FA20 DIT engine is designed to switch the upper breather portion of the Street Series AOS to the Competition Series AOS
IAG PTFE Fuel Line Kit (PN# IAG-AFD-2212 is required)
APR Exhaust Cat Back System Right Valve Other Breather Accessories CR21 4CYL (24mm - suitsThis optional valve can be used with our 718 982 2. 0T 2. 5T exhaust system to quiet the exhaust note on vehicles originally equipped with the Porsche Sport Exhaust (PSE) valve. Simply swap out our catback's straightpipe and put this in its place. V bands and precision clamps make removal and mounting a snap. The system is created from T304 stainless steel with a brushed finish and TIG welding throughout. The valve is cast and of our own proprietary
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