Atomic - Extreme Duty Valve Springs

Tension: 80 lbs at 1.490"

Tension at .500 valve lift: 175 lbs
Coil bind: 23.5mm/220 lbs
Recommended for boost levels not exceeding 1.8 bar (27lbs)
Uses standard retainers or Atomic

WOULD SUIT :

Ford Barra DOHC Engines

OTHER INFORMATION:

All Atomic H/Duty and Race Series springs are conically wound to accurately fit both the spring seat base and the smaller OD retainer. They are not just the inner spring out of a Chev or Ford V8 set, nor are they repackaged Ford DOHC V8 or Typhoon/Tornado springs (which fatigue just as quickly as the originals) but are custom wound from premium quality USA made nickel chrome vanadium spring steel, heat treated, shot peened, scragged and packed in matching sets of either 12 or 24 for use in all 4.0L SOHC and DOHC 6 cyl engines. Suitable for use with either standard or Atomic camshafts, no expensive cylinder head machining is required and the standard valve spring retainers, seals and locks can be retained.