Mishimoto Subaru WRX 2015-2021 Street Performance Black Top-Mount Intercooler Kit, 2015+ - MMTMIC-WRX-15XBK Caps Steel sleeves are used to

Steel sleeves are used to join the Turbo Inlet Hose to the stock intake and by-pass-valve

The bespoke integrated check valve prevents coolant back flow from the turbocharger and does not require you to remove the factory check-valve before installation

TC2-SPG4 kit features a Sport pressure plate for a nice upgrade

RHP 4152 Series One-Way Check Valves prevent fuel or oil flow back

and mild steel O2 bung

Mishimoto Subaru WRX 2015-2021 Street Performance Black Top-Mount Intercooler Kit, 2015+ - MMTMIC-WRX-15XBK Caps Steel sleeves are used toPRODUCT FEATURES Direct fit for the 2015 2021 Subaru WRX Designed for optimal performance on highly modified vehicles using stage 2+ tuning Power gains of up to 15 whp and 8 wtq on performance tune 35F temperature drop compared to stock intercooler on performance tune 100% aluminum construction with durable cast end tanks TIG welded to a highly efficient bar and plate core Mandrel bent aluminum Mishimoto charge pipe included to increase flow