1.6T Ferrera Dual Valve Springs G4FJ kona N75 Motorsports ECU's DO NOT

N75 Motorsports ECU's DO NOT disable Bluelink unlike other tuners

A must when replacing your flywheel

for car fans and experts

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1.6T Ferrera Dual Valve Springs G4FJ kona N75 Motorsports ECU's DO NOTSPECIAL ORDER SET OF 16 Made to rev safely to 10,000RPM Made in the USA Ferrera double valve springs are the highest quality available, needed for 7,000RPM or up to 10,000RPM. Harmonics or high frequency fatigue is present in all racing engines and will usually destroy the valvetrain if not controlled. Properly designed valve springs will control the dominant harmonics, provide the needed stability, and reduce valvetrain component wear. Ferrea valve