Valve Spring – 1.241″ OD


  • Single spring with damper
  • 1.241″ O.D.
  • 1.150″ solid height
  • Production spring for 350/290 HP engine

Valve Spring, 1.241″ O.D.

P/N 94666580

  • Spring type: single with damper
  • OD: 1.241″
  • Pressure at installed height: 80# @1.700″
  • Solid height: 1.150″
  • Average rate (lbs @ in): 267
  • Retainer: P/N 14003715
  • Valve seal kit: P/N 10132715

Technical notes: Production spring for 350/290 HP engines.


Small Block Valve Spring, 1.241″ O.D.

94666580 Chevrolet Valve Spring

350/290 Engine

When it comes to building the Small-Block engine for the project vehicle of your dreams, you don’t want to sacrifice performance or durability ヨ and that’s why you should trust Chevrolet Performance. They’ve been designing, testing and manufacturing Small-Block parts since 1955. Their engineers know what it takes to offer the finestquality parts for your Chevy.

Prop65WARNING: These auto parts can expose you to chemicals including phthalates and lead. Installing or using these parts can expose you to other parts containing these chemicals and to engine exhaust, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to