Made from the highest quality alloys
Custom Wound springs are engineered to endure stresses of high performance engines
Each set is Matched for load consistency, a variance of + or - 10% is acceptable
Thousands of engine builders have come to rely on PBM valve springs

• 1.440 OD dual with damper
• .600 in max lift
• 135 lbs @ 1.800 installed height
• 320 lbs @ 1.200 open pressure
• Coil bind 1.125
• For flat tappet & small block hydraulic roller camshafts

Use Retainer# 502, 506*, 511 *titanium
Use Cup# 2602
Use ID locator# 2654