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Ovate wire beehive LS9 valve springs
PN 12625033

Description:

  • LS9 valve springs, GM part # 12625033

  • Also replaces earlier GM LS3, LS2 and LS6 valve springs

  • These earlier GM part numbers have been replaced by these springs:

    • 12565313

    • 12606144

    • 12586484

  • One engine set (16 pieces)

  • Shipped loose

  • For use with camshafts up to 0.560" valve lift  (assuming 1.800" installed height)

    • Recommend checking spring coil bind height when being used with camshafts over 0.530" lift

Specifications:

  • Beehive style springs 
  • Seat pressure:
  • 90 lbs pressure @ 1.800" installed height
  • Open pressure:
  • 1.250" Height, 295 Lbs pressure 
  • Max lift .570" 
  • Use with cap 10166344 and keeper 10166345

    From the GM CT400 circle track engine technical  bulletin:

    Valve Spring Specifications
    Valve  Spring P/N: 12625033
    Diameter  Top (+/- .008")  1.060"
    Diameter  Bottom (+/- .008”): 1.270”
    Free Height  (+/- .015"): 2.122"
    Installed  Height: 1.800"
    Pressure @  Installed Height (+/- 5 lbs): 90 lbs.
    Open  Height: 1.300"
    Open  Pressure (+/- 13 lbs): 264 lbs.
    Coil Bind: 1.210"
    Wire  Diameter: Ovate

    Ok for use with the following camshafts  (assuming 1.800" installed height):

    • 12561055 ASA camshaft - 1.7 and 1.8 rockers

    • LS6 (2001 model year) - 1.7 and 1.8 rockers

    • LS6 (2002-2004 model year) - 1.7 rockers, NOT for use with 1.8 rockers

    • LS1, LQ4, LQ9 - 1.7 and 1.8 rockers

    • LS7 camshaft - 1.7 rockers, NOT for use with 1.8 rockers

    • LS3 camshaft - 1.7 rockers, NOT for use with 1.8 rockers

    • LS9 camshaft - 1.7 rockers, NOT for use with 1.8 rockers

    • LSA camshaft - 1.7 and 1.8 rockers

    • LS Hot Cam - 1.7 and 1.8 rockers

     

    Part #: 12625033

    Quantity:

    • Sixteen (16) pieces

    Condition:

    • Parts are brand new from bulk packaging
    • Shipped in bulk, loose