Autolite Spark Plug 4163/4 Copper

Intended for motorcycles with a stock engine using the stock airbox, air filter and stock pipe. stage 1 kits are fully adjustable to allow the use of a well designed aftermarket pipes and stock replacement air filters like k&n. stage 1 kits are designed to improve throttle response and drivability and in most cases power increases of approximately 5% throughout the entire power range can be achieved. maximizes carburetor performance. includes step-by-step instructions. dynojet jet kits: dynojet offers a wide range of kits to fit any application. several types (stages) of kits are available to fit your specific needs. whether you run a standard motorcycle, or a tuned sportbike, dynojet carburetor jet kits can provide you with a simple and affordable solution to all your carburetion problems. dynojet jet kits increase power and smoothness throughout the entire rev range, while maintaining optimum fuel economy. each dynojet jet kit includes comprehensive instructions which show step-by-step installation and testing procedures to ensure a perfect setup every time. this is backed by free telephone and internet support to dynojet customers.