Valve Spring Set Isky Racing Dual 240Z 260Z 280Z 280ZX

Isky racing dual valve spring set for Datsun 240Z, 260Z, 280Z and 280ZX, 1970-83. Chrome silicon dual springs, made in the USA. Set of 12 for 6-cylinder engines. Excellent spring for use with high performance aftermarket cams such as the Isky or Comp.  Requires retainer PT# 800-1373.

1.7 installed height, 130#'s seat pressure, 280 # spring rate, 1.34" O.D., .748" I.D.