GSC Intake Valve Guide w/ Stopper – +0.001" Oversize Single for Mitsubishi 4G63T – GSC3004.001-1
Crafted for Mitsubishi 4G63T engines, this GSC Power-Division intake valve guide features a stopper-style design and +0.001" oversize for precision fitment. Ideal for performance builds requiring tighter clearances and improved valve control under boost and heat.
Standard-size guides are available individually or in sets of 8. Oversized options (+0.001" and +0.003") sold separately for custom machining needs.
GSC3004 Standard Dimensions:
- Total Length: 1.670 in / 42.42 mm
- Outer Diameter: 0.4750 in / 12.07 mm
- Valve Stem Diameter: 6.6 mm
Perfect for DSM and Evo platforms, this guide supports consistent intake valve operation in high-RPM turbocharged applications.
Fitment:
- 1990 - 1999 Mitsubishi Eclipse GSX
- 1991 - 1992 Mitsubishi Galant VR-4
- Mitsubishi Lancer Evolution I–IX (4G63T-equipped)
- 2003 - 2005 Mitsubishi Lancer Evolution VIII
- 2006 Mitsubishi Lancer Evolution IX
- 1990 - 1998 Eagle Talon TSi AWD
- 1990 - 1994 Plymouth Laser RS Turbo
CA Residents: WARNING: Cancer and Reproductive Harm www.P65Warnings.ca.gov

