Helical Technology High Performance Exhaust Valves for Custom Applications Style:60mm ID - Vacuum Valve dyno-testing

dyno-testing

but with a stylish Boot-cut pant leg

Installing the Supercup exhaust alone with your factory catalytic converter downpipes does not produce much of a sound difference until combined with the other exhaust components as a package

and GTS pump engine noise into the cabin using a device called a sound symposer

Helical Technology High Performance Exhaust Valves for Custom Applications Style:60mm ID - Vacuum Valve dyno-testingHelical 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