HKS 65mm Exhaust Gaskets (2-Pack) Universal Fit | 34001-AK003 FRS_2013-2016 our Boost Solenoid uses a

our Boost Solenoid uses a Mazda style wiring harness so you can simply unplug your OEM solenoid and plug ours in

Part #: 3020-43066

Two aggressive mufflers with 4” tips

strong studs and high‑quality nuts to secure the oil pan flange reliably

Note: This replacement hardware kit has been specifically designed for the Cobb Stainless Steel 3-inch Cat Back Exhaust systems for your 15-21 WRX & 15-21 STI

HKS 65mm Exhaust Gaskets (2-Pack) Universal Fit | 34001-AK003 FRS_2013-2016 our Boost Solenoid uses aHKS 65mm Universal Exhaust Gaskets deliver professional grade sealing performance for high flow exhaust systems. Engineered by HKS, these premium gaskets ensure leak free connections in demanding performance applications, making them essential for turbo builds, header upgrades, and exhaust modifications. Key Features & Benefits Premium Construction High temperature resistant materials withstand extreme exhaust heat and pressure Universal 65mm Design