Re: 155's non studded?
From my understanding, there are some pretty tight tolerances (to the thousandths of an inch or something crazy like that) when it comes to building injectors for our trucks. I'd be worried that they weren't necessarily done right etc especially if they were from some no name company or individual. Not saying this is the case here. Just something to keep in mind.
2007 Ford F250 CCSB - Daily Driver
KC Turbo, WPE Manifold, Fuel System, Exhaust, Studded, Deleted.
670RWHP / 1153RWTQ-Fuel Only
2000 Ford Lightning SVT - Weekend Toy
Built Motor, Whipple , Heads, Cams, Fuel System, Exhaust, Suspension, Full interior with AC
10.9 @ 124mph on 18" DR's on Pump Gas