Maybe this will help, it's from their website


The 175/146 injectors are a terrific upgrade for those 1999-2003 (or late 96 & 1997 California), 7.3L owners looking for efficiency, as well as a modest power increase. The 175 single shot injectors retain the OEM ("146"nozzle), use NO more high pressure oil than stock AD split shot injectors, yet flow 25+cc's more fuel.

A good scan tool with live data will tell you your injection pressure. Most shops will do it for free.

Need a scan tool to watch ICP.

Tuner is off to TW for a reburn, we will see what happens when it comes back!!

Ok so tuner is back, egt are good now, BUT, the power is almost worse then with the stock injectors and there is NO smoke. I have spoke to some people and they say you are not supposed to run a single shoot in a late 99??? Any thoughts on this, could this still be a tuner issue? ? Thanks again

You can run any year you want as long as you have the right programming for them

Ok well maybe he didn't program it right! I know smoke doesn't equal power, but I would think there would be more now then stock and there is none!

He might have pulled the fuel back to far on them.

Ok, so I drove almost 2 hours to have a guy (Morris motorsports) look at it. After studying the truck and changing the tunes it runs awsome!!! Its like a totally different truck!! Highly recommend him for any work!! Very smart and very fair!