Upgrade Your Intercooler Couplers

The PERRIN Performance intercooler coupler kit replaces your factory coupler with a high-gloss, vibrant blue silicone hose that looks great and outperforms the OEM rubber. Designed as a direct-fit replacement for the TMIC throttle body connection on 2008–2019 WRX and 2005–2009 Legacy GT.

5-Ply Fiber Reinforced Silicone

PERRIN's couplers are constructed from fiber-reinforced 5-ply silicone tubing. The multi-layer design handles extremely high boost pressures and temperatures without ballooning, cracking, or collapsing — a common failure point on aging OEM couplers.

Why Upgrade?

Factory rubber couplers harden and crack over time, leading to boost leaks that rob power and trigger boost-related fault codes. PERRIN's silicone construction stays pliable and maintains a consistent seal across a wide temperature range.

Fitment: 2008–2019 Subaru WRX | 2005–2009 Subaru Legacy GT

Part Number: PSP-ITR-321BL

Prop 65 Warning

⚠️ This product can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.