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GSC P-D 4G63T EVO 8-9 Stage 1 Beehive Valve Springs (Use Factory Retainers and Spring Seats) - Black Ops Auto Works
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GSC P-D 4G63T EVO 8-9 Stage 1 Beehive Valve Springs (Use Factory Retainers and Spring Seats)

GSC5039
GSC5039
Valve Springs, Retainers
3 Units In Stock - Ships Next Business Day
$ 254.18 $ 216.05
$ 216.05

SKU: 5039

GSC Power-Division 4G63T EVO 8-9 Stage 1 Beehive Valve Springs (1990-2006 Mitsubishi DSM & Lancer Evolution, Use Factory Retainers and Seats)

GSC Power-Division Stage 1 Beehive Valve Springs upgrade 4G63T engines in Mitsubishi Lancer Evolution 8-9 and DSM models like Eclipse GSX, GST, Talon TSi. These springs deliver 118 lbs seat pressure at 1.660 inches and 306 lbs open pressure at 1.150 inches max lift for precise valve control. The beehive shape cuts valvetrain mass by 35 percent over OEM dual springs, supporting 10,200 RPM reliably.

Key Features

  • Beehive Design: 35 percent lighter than stock dual springs, reduces inertia for smoother high-RPM operation and less wear on valvetrain components
  • Seat Pressure: 118 lbs at 1.660 inches installed height ensures valves stay seated during aggressive driving and boost
  • Open Pressure: 306 lbs at 1.150 inches max lift with 280 lbs per inch rate handles stock cams or mild grinds without float
  • Factory Compatibility: Works directly with OEM retainers and spring seats for drop-in install on Evo 8-9 and 4G63T DSM heads
  • Premium Construction: Heat-treated chrome silicon steel withstands high heat and stress in turbocharged 4G63T applications

Product Notes

  • Set includes 16 springs (8 intake, 8 exhaust) with coil bind height of 0.950 inches
  • Free length 2.165 inches intake and exhaust, outer diameter 1.059 inches
  • Ships in protective packaging to prevent damage during transit

Installation Notes

  • Professional installation recommended.
  • Set installed height to 1.660 inches for correct seat pressure, verify with dial indicator
  • Uses factory retainers, seats, and locks, no additional hardware required

This Part Fits

Year Make Model Submodel
2003-2005 Mitsubishi Lancer Evolution VIII MR
1990-1998 Eagle Talon TSi
1990-1994 Mitsubishi Eclipse GS
1990-1999 Mitsubishi Eclipse GST
1990-1999 Mitsubishi Eclipse GSX
1996-1999 Mitsubishi Eclipse Spyder GST
1991-1992 Mitsubishi Galant VR-4
2005-2006 Mitsubishi Lancer Evolution
2005-2006 Mitsubishi Lancer Evolution MR
2005-2006 Mitsubishi Lancer Evolution RS
2006 Mitsubishi Lancer Evolution SE
1990-1994 Plymouth Laser RS

Why Choose GSC Power-Division?

  • Engine dyno and track tested for 4G63T reliability in racing applications
  • Precise manufacturing tolerances ensure consistent spring rates across the set
  • Lifetime warranty on spring failure when installed and used per specifications

Frequently Asked Questions

  • Q: Does this fit 2G DSM Eclipse GSX or Talon TSi with 4G63T?
    A: Yes, compatible with factory valvetrain on 1990-1999 Mitsubishi Eclipse GST/GSX, 1990-1998 Eagle Talon TSi, and similar DSM models listed
  • Q: What material are the springs made from?
    A: High-temperature chrome silicon steel, heat treated for fatigue resistance and longevity in boosted 4G63T engines
  • Q: What warranty coverage is provided?
    A: GSC Power-Division lifetime warranty against breakage if springs stay within 10,200 RPM limit and proper installed height

Shipping & Handling

  • Method: UPS or FedEx Ground
  • Availability: In stock - ships same or next business day
  • Packaging: Secure box measuring 8 x 6 x 4 inches
  • Weight: 2.6 lbs
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