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Stage 1 Tune Required Mods (Made for a car with no mods
the company has been developing and manufacturing high performance car care products
0Ts with Stuffed turbos we tune have under 50
Resistant to wear as well as oils
Rest assured your tune satisfaction or your money back
1.6T Ferrera Dual Valve Springs G4FJ golf Stage 1 Tune Required ModsSPECIAL 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
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