I agree with that and figured a retune would be necessary but I was told by Lund that there is no tune revision with the long tube headers. I currently have a SCT X4 programmer. I believe I can use that to datalog.
I installed kooks long tubes with off road H pipe last week and love them. Prior to install the vehicle only had JLT
CAI and a Lund tune. I was told there is no revision for the tune after installing the headers.
I have been hesitant to step on the gas however. The car seems to be running fine...