The amount of power an engine can produce depends on the quantity of fuel and air it can burn. To enable good gas flow through the cylinder head we offer a range of inlet and exhaust valves that offer improved design and are also available as an oversize.

QED HiFlo
These valves have a wasted stem to increase gas flow around the valve

Oversize
Inlet and exhaust valves are available with a +1mm head diameter

Narrow Stem
For the least possible interferance with the gas flow these valves have a narrower (5mm) valve stem