i am going to assume this is a set of slip ons your are referring to, based on the pricing your dealer quoted.
slip ons are a simple/easy install on your monster. the ecu that comes with the system is also an easy install. i believe this system also includes a new "holed" airbox lid, and again, simple install. the only part of the install you will need to part out to the dealer is to reset the TPS. even this is a simple process, if you have access to a VDST, and i bet someone here on the forum has one.
figure about 2 hours total time spent on the install, if you work slowly and take your time. fairly simple tools required ... standard metric: socket set, allen wrenches and a torque wrench. helps if you have the workshop manual, to get the proper torques from if the installation instructions do not mention them. again, someone here should be able to advise torque specs.
save the installation cost ... do it yourself and become one with your bike
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