991.2 Porsche 911 and 982 Boxster GTS and Cayman Spyder, GT4, GTS 4.0 Valve Controller GranTurismo Fabspeed is the Wolrds 1st

Fabspeed is the Wolrds 1st and Best authority on Mclaren Performance as we have the most experience

Light weight design saves 2 lbs / 0

This full 3 in system will wake up your LT2 engine like no other exhaust out there

Fits all Porsche 970 Panamera GTS (4

The perfect compliments to Fabspeed's exhaust upgrades

991.2 Porsche 911 and 982 Boxster GTS and Cayman Spyder, GT4, GTS 4.0 Valve Controller GranTurismo Fabspeed is the Wolrds 1stFrom the factory, your Porsche's valve system has a limitation, but with the KIES Valve Controller, you can take control! At a standstill and at lower RPMs, your car is programmed to partially close the exhaust valves, even when you have them OPEN. With the KIES Valve Controller, you can take control to fully open the valves to enhance the flow and the sound from your exhaust. In many cases, we've found that customers with PSE (Porsche Sport Exhausts)