Whats size are you looking into.
Maybe i read this wrong BUT rip said the jammer where better that the MACH 4s??
The mach injectors are the most precise for the cummins.
Ok sorry. . You must have jammer 5s not as clean or smooth as the F1 mach 4s. .
I love my DDP injectors. Lenny is a friend and the most straight forward, honest vendor I have met. DDP stands behind their product.