Knocking noise w/audio

[DBUSHLB7]

Your engine sounds siiick. You are not hearing the added cylinder pressure from the tune that twins require are you. There is no piping rub anywhere? Usually a noise as you are describing that is audible more in the cab and becomes more faint with rmp means some thing is touching some where even if ever so slight of contact is made in the engine compartment lots of noise can be made in the cab. Sweet truck btw im jealous.

It may be piping but I've looked and looked and watched and watched. Clearances are good. Zach Stapleton @ ATS is a damn good welder/fabricator. He did it right I think. I realize my videos are horribly amateur but this knocking is horribly consistent with what the motor is doing. A close friend and I are almost certain it is valve noise and will tear into it this weekend. Thank you for the compliments! It's funny to hear you say you're jealous kuz I feel the same about all the guys with built motors n such here. I guess we are sometimes never content are we?