Single Exhaust Valve
Compatible with: Pontiac 4.9L 301 (Enginetech V1837)
Nominal Stem Diameter: 11/32 inches
ET Stem Diameter: 0.3412 inches
Standard Head Diameter: 1.500 inches
ET Head Diameter: 1...
Single Exhaust Valve
Compatible with: Ford 429 (Enginetech V1977NA)
Nominal Stem Diameter: 3/8 inches
ET Stem Diameter: 0.3708 inches
Standard Head Diameter: 1.672 inches
ET Head Diameter: 1.672...