MANLEY NexTek SERIES High Performance Valve Springs [Maximum Valve Lift .780 | O.D. 1.335 | I.D. .622 | Installed/Open Pressure 270 @ 1.800 870 @ 1.020 | Rate (lbs./in.) 780 | Coil Bind .960 | Weight (grams) 109] (GM LS) : COLORADOSPEED - LATE MODEL DOMESTIC (AMERICAN MUSCLE) | IMPORT (EUROPEAN | SPORT COMPACT) AUTOMOTIVE PERFORMANCE PARTS