Getting ready to finally chop about 4 inches off my full Arrow system and have a couple questions for the experts. Will I lose considerable backpressure in chopping these cans? So much that I will need to re-tune the ECU? Theoretically, would it actually hurt performance? Thanks.
Bike is an S2R 800 with full Arrow system, open airbox, and Nemesis ECU.
Not realy, if the utter is gone then there is not much left to restrict the gas flow. You should be fine. You could always Dyno the bike when you are done and remap if you need to.
If you're not using the db killers there should be virtually no difference in backpressure due to the straight-thru design.
Living in Thailand it gets very hot so I located the Rectifier on the S4 low at the front in the airflow and when it rained it blew very quickly so the replacement is now back under the seat.