We strongly recommend the Rotor Housing Water Jacket Modification to improve cooling in the hot zone of the rotor housing, thereby increase both rotor housing and apex seal life. This modification involves cutting grooves in the water jacket in the vicinity of the leading and trailing spark plugs to increase heat transfer out of the housing inner surface. The modification can be performed on a new rotor housing, and is only appropriate for race and the most extreme street use.
The price listed is the labor charge "per housing". Contact Racing Beat at 714-779-8677 to schedule this service.