1.6T Ferrera Dual Valve Springs G4FJ kona Porsche 000 043 305 63

Porsche 000 043 305 63

A must when replacing your flywheel

for car fans and experts

Octane leaning disable for boost and timing

All H&R products are crafted in Germany and exceed ISO 9001 quality assurance standards

1.6T Ferrera Dual Valve Springs G4FJ kona Porsche 000 043 305 63SPECIAL 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