twin plug

22Aug

Harley-Davidson Dual 10mm Spark Plug Head

The right way to convert a cylinder heads to twin plug! The jig that is generally available to Harley-Davidson workshops and tuners, used to convert Harley-Davidson heads to a twin spark plug set up does not provide the best solution. Whilst this promises a performance...
05Feb

Twin Plug Conversions

The image to the right is an example of what can be achieved, a Triumph T120 oppositional-angle, twin-plug conversion. Such twins cylinder heads cost from £65.00. Other options offered by the Cylinder Head Shop include the use of an offset vertical relocation of the spark...