xtreem duty valve springs are made from Vanadium-Elector Ultra Clean material, this valve spring line represents some of the best springs on the market when used under race conditions because of their long life expectancy. Each set is batch tested for consistency and matched to tolerances of +/-10% of the stated spring rate. Our choice of Chromium Silicon III and xtreem Alloy gives engine builders reliable dampening and precision valve control lap after lap or pass after pass. These xtreem alloy springs are simply the best. Each sprig is precision wound, ground for tolerance, and stress relieved to ensure longevity in extreme engine conditions.
MADE IN USA!
Recommended Application
Preferred spring for SBF Yates, 12X and Pro 15 &other heads with engines running cam profiles up to .770
Number of Springs Per Valve: Dual
Outside Diameter of Outer Spring (in): 1.550 in.
Outside Diameter of Inner Spring (in): 1.125 in
Inside Diameter of Inner Spring (in): .735 in
Coil Bind Height (in): 1.190 in.
Damper Spring Included: Yes
Seat Pressure Install Height: 250lbs@2.000
Spring Rate (lbs/in): 590lbs /.720"
650lbs / .770"
Valve Spring Style: Standard
Quantity: Sold as a set of 16.