GSC Valve Guide EVO/DSM/VR-4 4G63

GSC Power-Division valve guides are precisely CNC turned from C67410 Manganese Bronze, making them easier to install and improving air flow unlike traditional OEM designs. With the tightest tolerances and superior quality control, these guides save time during installation. Available in standard and oversized sizes, consult an experienced engine builder before use.

Specification:

GSC3001-8 / GSC3001-1

• Outer Diameter: 12.070mm
• Length: 49.53mm

GSC3001.001-1

• Outer Diameter: 12.071mm
• Length: 49.53mm

GSC3001.003-1

• Outer Diameter: 12.073mm
• Length: 49.53mm

GSC3002-8 / GSC3002-1

• Outer Diameter: 12.070mm
• Length: 42.42mm

GSC3002.001-1 

• Outer Diameter: 12.071mm
• Length: 42.2mm

GSC3002.003-1 

• Outer Diameter: 12.073mm
• Length: 42.2mm

Expert Tip: Choose the correct guide size based on the outer diameter (OD) of the valve stem, not the inner diameter (ID). If your valve guides have been frequently removed, their holes may have become oversized due to material loss in the head.

Vehicle Fitment:

Lancer Evolution I-IX 1992-2006

Eclipse GSX/GST 1990-1999

Galant VR-4 1989-1993

Talon TSI 1990-1998

Laser RS 1990-1994