GReddy Surge Tank for Nissan S14 & S15 SpecificationsManufactured to make the most of the SR20DET engine in the Nissan 200SX S14 S14A and Silvia S15 ("Black Top" engine) this high-volume high-flow GReddy cast aluminium plenum is ideal for use with aftermarket turbochargers. Its design allows airflow to enter each cylinder undisturbed and evenly for improved engine performance.Key FeaturesTo fit SR20DET engineTank capacity : approximately 1.6 times the OE ratio (+60%)Compatible with the factory throttle bodyPlease note : as the mounting position is different from stock some intake pipping modifications may be required.