Ignition Spark Box 71-77 3 pin
Replaces orignal ignition box, All Porsche 911's 1969 to 1977. It not only replaces the stock system, it is a performance upgrade, boosting the spark energy by a factor of three. Bolts & plugs in to the same location as original. Increased spark energy allows your engine to make more power for the same amount of fuel. New coil must be fitted at the same time as permatune unit