Product Description Specifications COMP Cams High Load Beehive Valve Springs for GM Duramax Engines, 1.013"/1.101" OD, 120 lbs @ 1.640", 275 lbs @ 1.040" Category: Engine Components>Valve Springs, Retainers Core: N LTL: N MPN: 26125-32 Proposition 65: Y Special Order: Y