The absolute BEST valve spring for the LS1 engine or SB Chevy
Conical design oval wire valve spring will fit factory retainer
Beehive design delivers superior dampening
Oval wire design allows higher valve lift & increased seat and nose pressures
Ideal for hydraulic roller cam applications

• 1.290 OD
• .600 max lift
• 110 lbs @ 1.750 installed height
• 270 lbs @ 1.200 open pressure
• 1.050 coil bind

Use Retainer# 512 or 513
Use ID Locator# 2681 or 2651