Ferrea Racing Components - Valve Springs for Audi
Discount Ferrea Valve Springs - Audi
Ferrea Valve Springs - BMW
For ALL racing environments!

Developed from high strength alloys
Springs are heat treated and stress relieved = increase in spring's life!
Provide stability needed for high lift and high RPM.
Minimizes load loss for today's aggressive valvetrain combo's.

"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 catalog, '03)

IMPORTANT: All Valve Springs require Retainers and Spring Seat Locators. See requirements listed under Part #'s. 
BMW 3 Series (M50-M51-M52)
Part # Type Inner OD Outer
Chrome Silicon
Max Lift Price/
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S10049 Dual Spring - Turbo
Special Alloy
22.75mm 29.5mm 80 lbs @ 36mm 180 lbs @ 26mm 14mm $21.99
Valve Springs Require:
1) Ferrea Titanium Retainer #E11025 OR Ferrea Aluminum Magnesium Retainer #E10025
2) Ferrea Spring Seat Locator #SL1021 - Discard OEM Spring Seat Locator
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