Manley Performance Big Block Chevrolet Race Master Valves 11/32" Stem Diameters

- XH-426 Stainless Exhaust Material

- Chrome Stems and Hard Tips

- 11/32" Stems for Improved Flow, Lighter Weight

- Swirl Polished and Fully Machined

- Exhaust Type

- Head Diameter 1.880

- Stem Diameter .3415

- Installed Height .100 Longer

- O/A Length 5.522

- Tip Length .250

- Underhead Angle/Radius 10° x 3/8"

- Margin .075

- Seat Width .100

- Top of Head 6° Dish

- Wgt/Grms 124