APS Tumbler Delete Subaru STI 04-05

High Horsepower demands a free flowing intake system that is unencumbered by the restrictive stock Tumbler Generating Valves. The bolt on APS Tumbler Valve Delete Housing is a precision machined aluminium housing that replaces the stock Subaru component (which mounts between the cylinder head and the intake manifold/throttle body assembly) - and dramatically reduces the restriction between the throttle body and the inlet valves at high horsepower levels.

Also included in the APS Tumbler Delete system are two precision manufactured Throttle Position/Servo couplings. These components are mandatory for continued correct operation of the tumble control drive/feedback system. Without these components, the engine management system will detect a tumbler valve malfunction.

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About Manufacturer: APS
APS have over twenty years experience in designing and manufacturing turbocharger and intercooler systems combined with an extensive background in EFI engine management systems for select 4X4 and performance passenger cars.

Each product release is the result of a comprehensive research and development program designed to produce a totally engineered performance package.

APS' signature lies in the quality and durability of its components, the attention to detail in every system and the absolute standard that "performance must always be reliably achieved". APS products are professionally packaged, backed by a 3 month conditional warranty against manufacturing defect and available worldwide from specialist automotive businesses.