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Perfect for your Subaru WRX or STI
stronger starts in warm and cold weather over the factory unit
spring loaded cylinder and pressure regulation provides up to 150 retarding horsepower throughout the engine's RPM range - not just at high rpm like some designs that use holes or additional parts and claim it as a better idea
The S463 is a great place to start for any sub 700 RWHP application
Fleece Performance FPE-AFPF-BLK Water Resistant Pre-Filter Black (FPE-34133) Fleece 2nd Gen Swap Air Filter Fleece Performance CORE-2100 Perfect for your Subaru WRXOur Fleece Pre filters are specially designed to extend the service interval of your air filter when used in heavy dust conditions. Made from a durable polyester material it will stop small dirt particles with minimal restriction to the airflow of the filter. Pre filters are available in either black or orange and come with a silk screened Fleece logo. Water Resistant Pre Filter Black (FPE 34133) Fleece 2nd Gen Swap Air Filter
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