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I was thinking about buying the TP Stage I now, and then the TP Crossover w/ Fixed Orifice later. Then I realized that the ITP RR kit is cheaper than the two TP kits combined.
Does one of these two options (TP Stage I and crossovr w/ FO, versus ITP RR kit) have any real advantage over the other?
It depends on how much modification you intend to do in the future. I know of one tuner/supplier/dealer that thinks the stock system is MORE than sufficient for ANY injector and has run almost 600 hp on it. IMHO the ITP is more than sufficient for anything you'll probably ever do to your truck. It's as easy to install (if not easier) than anything on the market, it's high quality, and Dennis@ITP knows his stuff. That's what I run on my truck and I can't keep it fed, so I know it flows plenty.
I talked to the guy at Trusted Performance in depth about their products. The fixed orifice will only work with certain applications...not a stock pump.
I decided to buy (when I can afford it) the ITP RR kit. It is everything you need to feed your injectors properly....and it is a true regulated return kit...that coupled with an airdog you have a great working fuel system.
Trusted Performance wants almost 1k for the same type of kit...their kit looks nicer, but really who cares.