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Performance improvements like this can be felt in the "seat of your pants" and will truly transform your Porsche driving experience

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Helical Technology High Performance Exhaust Valves for Custom Applications porsche 997 brake pads Performance improvements like this canHelical 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