Hello guys,

Maybe someone can point me in a right direction. I recently installed KS rear exhaust tuned cannisters in two different planes. Both with DA 150's. I was told by DA to have the headers lengths at 11 1/2" measuered along the centerline of the pipe from the mounting flange to the end. This was done with the header laid and measured on it's side. Attached the cannisters with about 1/8" gap to the header.

My question. Why would the engine seem to be very, how to put it, touchy, peaky, or very responsive at a certain point along the throttle transition which makes the engine seem like it was just kicked in on nitro. There also seems to be a small dead spot for throttle responce just prior to this drastic change in rpm's. Is there something I am missing ? I tried to change the curve on the transition to no avail. This is my first setups with this type exhaust systems.

Any advive would be helpful.

Thanks