GSC Power-Division Race Conical Spring kit with Ti Retainer 4G63T

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GSC Power-Division Race Conical Spring kit with Ti Retainer 4G63T

1,000+ HP BUILDS ONLY

  • IN: 134 lbs @ 1.504" / EX: 140 lbs @ 1.484" install height
  • IN: 275 lbs @ 12.1mm lift / EX: 280 lbs @ 12.0mm lift

Check your valve spring install heights here

    • Part Number
      GSC5078
    • $610.03
    Out of stock
    warning Warning: This product can expose you to chemicals including Nickel (Metallic), which is [are] known to the State of California to cause cancer and birth defects or other reproductive harm. More information on California Proposion 65 can be found on Proposion 65 Warnings and OEHHA websites.

    *Flip phone to landscape to see full table!*

    GSC5078 RACE Conical Valve Spring Kit with Ti Retainer for 4G63
    SetupCoil Bind (in)Install Height (in)Seat Pressure (lbs)Open PressureMaximum Valve Lift (in)
    HP Conical0.9521.504 / 1.484134 /140275 lbs @ 12.1mm lift 
    280 lbs @ 12.0mm lift
    0.476
    • Max RPM: 11,000 RPM
    • Max boost: 60+ psi

    Trying to break records? Trying to win races? This is the valve spring kit for the 4G63T that will allow you to take your engine package to the next level. Not for street cars or sub 1,000 HP builds, in that case please see our GSC5040 or GSC5041 beehive spring kits. Capable of controlling the valves with 60+ psi of boost at 11,000 RPM with 12.1mm lift cams. In racing, every tenth of a gram matters, so our redesigned Ti Retainer is 10% lighter and smaller, while still adding the strength needed to keep the valvetrain in one piece at 11,000 RPM.

    The GSC5078 kit also includes our GSC4041 chromoly CNC replacement valve spring seats that are 0.035" thicker than the OEM part. Able to use NEW OEM valve spring keepers or our GSC1003 keeper kit. No need for special aftermarket locks that have the potential of being the wrong angle. Sold as a set: 16 conical valve springs, 16 Lightweight Ti Retainers, 16 thick CNC chromoly spring seats.

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