Perrin Subaru 02-07 WRX 04-14 STi Top Mount Intercooler Coupler Kit
You are looking at the PERRIN Performance Throttle Body Coupler. Over time and mileage, your factory intercooler coupler can become dry and crack over time due to engine vibration, and like all things, it can become deteriorated due to the elements. This could cause boost leak issues which will certainly limit your performance.
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 go to www.P65Warnings.ca.gov