Rubber is out and silicone is in for your 2015 WRX! We have carefully selected 12 2015 WRX hoses, both PCV and coolant lines, which we found can easily be replaced and benefit from the use of silicone.
Mishimoto Chevrolet/GMC 6.6L Duramax Silicone Coolant Hose Kit, 2006-2010; Blue
Mishimoto Silicone Coolant Hose Kit, fits Toyota Tacoma 2.7L 2005-2015
Mishimoto MMCP-25125BL Mishimoto Straight Silicone Coupler 1.25"
Mishimoto MMRAD-TAC-05 Mishimoto Performance Aluminum Radiator, Compatible with Toyota Tacoma 2.7L & 4.0L, 2005-2015
Mishimoto Black Silicone Coupler w/ 3" In / Out & 1 / 8" NPT Bung MMCP-30NPTBK