Just recently went to a top mount 6870 and next step is throwing a LPFP in. Are there any on the market that are truly just a drop in pump with no modification to the vehicle?
If its a 6mt it really isnt a good starting point. I used it at first because I wanted to go through each step from stock, to jb4, to mhd+jb4, to full tune and there is no comparison if you get the right tuner. The throttle closures, the fuel trims, the lean AFRs, the inconsistencies all suck...
If you are running a manual just unlock it … trust me no one has more time in a 6mt on a jb4 testing and tuning than I do … you can get it to move pretty good on the jb4 but it will always be unpredictable