Helical Technology High Performance Exhaust Valves for Custom Applications Brakes YOU dont want sintered metal

YOU dont want sintered metal clutch dust going into your engine seriously

2 Cayenne Turbo / Turbo S Valvetronic Exhaust System provides the best of both worlds

Replace the restrictive OEM ceramic GT2RS 700 cell catalytic converters with ultra free flow HJS German Imported tri-metallic race quality 200 cell HD cores that flow 92% to 93% of a straight pipe

Reuse your factory OEM tips or upgrade to Fabspeed Deluxe Quad-Style Tips in your choice of finish

Complete high-performance exhaust solution for the Porsche 993 Turbo

Helical Technology High Performance Exhaust Valves for Custom Applications Brakes YOU dont want sintered metalHelical Technology is the UK's foremost producer of high specification engine control systems supplied to many of the world's leading vehicle makers, manufacturing valves of the highest quality for some of the most technically advanced and difficult applications. Helical Valves are the standard for high performance OEM applications ranging from Ferrari and Porsche to Lamborghini, McLaren and more see the full list below. They offer a proven OEM