If you're towing frequently, then I'm not sure why you are looking at 190cc injectors and a dinky turbo like a Stage 1/Powermax. I guess it all depends on the weight you're looking to yank around. I have 190/100s, and I couldn't imagine trying to tow with these injectors and a Stage 1. On Eric's Xtreme X, I could 1800F EGTs before 80 mph empty and I don't see the point in getting 190s and then cramping down the injector's ability to flow just to say you have 190s. I guess, what I would recommend is if you go with 190s, then get at least 50% nozzles as 30% nozzles (like stock) are going to be too small.