ok i meant to say Flange bolts on the heading not Flane..and Lift not lify...but i felt a totally change of hitting lift..going into lift are so much easier and smooth, not like before it kinda bump a lil bit when hit lift but now the sound of the Intake just changes and the power pick up are smoother and betta..took only 1hr to complete, because i was taking my time to make sure everything is where it suppose to be..next time it'll be 30mins top..