MANLEY NexTek SERIES High Performance Valve Springs [Maximum Valve Lift .700 | O.D. 1.340 | I.D. .726 | Installed/Open Pressure 170 @ 1.810 450 @ 1.110 | Rate (lbs./in.) 394 | Coil Bind 1.050 | Weight (grams) 94] (GM LS) : COLORADOSPEED - LATE MODEL DOMESTIC (AMERICAN MUSCLE) | IMPORT (EUROPEAN | SPORT COMPACT) AUTOMOTIVE PERFORMANCE PARTS