immgoing to get an oil change this week at the dealership and while it is there I'm wondering if they can do a test that would find any kind of boost leak/ wastage malfunction. At the top end I think the boost might be tapering off... I don't know what else would make a 5-7 mph difference on the big end... With my setup I should be trapping well over 120 mph, don't you think? Do you recommend putting it on the dyno to see if I'm putting out full power?

 

Absolutely put it on a dyno. It will show if there's a leak etc