hello i've been hearing cpi are better than t5... i've never really heard of cpis and while looking at t5 pipes i found this dyno...
http://www.jokersracing.com/content-product_info/product_id-13132/yamaha_banshee_toomey_t5_full_exhaust_system_toomey.html
scroll to the bottom obviously t5 pull out ahead so why is everyone going with cpis?