Single Exhaust Valve
Compatible with: GM/Chevy 2.8L 173/3.1L 189 Alum Cyl Head (Enginetech V2143)
Nominal Stem Diameter: 8.00 mm
ET Stem Diameter: 0.3136 inches
Standard Head Diameter: 1.425...
Single Intake Valve
Compatible with: GM 3.1L 189/3.4L 207 (Enginetech V3532)
Nominal Stem Diameter: 8.00 mm
ET Stem Diameter: 0.3139 inches
Standard Head Diameter: 1.718 inches
ET Head Diameter: 1...