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The stage 1 kit is intended for motorcycles with a stock engine using the stock airbox, air filter and stock pipe. They 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 drive-ability and in most cases power increases of approximately 5% throughout the entire power range can be achieved.
*Generic photograph may be used for illustration purposes