GSC 4G63 Beehive Race Spring Kit (5058) *Discontinued*

The GSC Power-Division race beehive valve spring kit for Evo and DSM includes 16 super finished beehive springs, 16 lightweight titanium retainers, 16 thick CNC chromoly spring seats. Not for street cars or sub 1000 HP builds! Capable of controlling the valves with 60+ psi of boost at 11,000 RPM with 12.1mm lift cams due to improved harmonics of the beehive spring with optimized spring rates and the smallest titanium retainer GSC offers.

Discontinued:
As of September 2021, GSC has discontinued this product. We have none remaining in stock.
• See more Evo 7/8/9 Valve Springs
• See more Evo 4/5/6 Valve Springs
• See more DSM Valve Springs

Vehicle Fitment:
Mitsubishi 4G63
1992-2006 Evolution I-IX
1990-1999 Eclipse GST/GSX
1990-1998 Talon TSi
1990-1994 Laser RS
1991-1993 Galant VR4

• For 1,000+ HP Builds Only
• IN: 125 lbs @ 1.504" / EX: 131 lbs @ 1.484" install height
• IN: 279 lbs @ 1.032" / EX: 285 lbs @ 1.012"

Includes:
(16) Super-Finished Beehive Valve Springs
(16) Lightweight Titanium Retainers
(16) Thick CNC Chromoly Spring Seats

More Info:
Trying to break records? Trying to win races? This is the valve spring kit that will allow you to take your engine package to the next level.

The Beehive springs are super finished to reduce stress and add durability while also adding a clean, silky smooth surface. In racing, every tenth of a gram matters, so the GSC 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.

This kit also includes the 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 GSC1003 keeper kit. No need for special aftermarket locks that have the potential of being the wrong angle.

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