Here is a website that sells a complete inside the frame rail CAT kit that only takes about 30 minutes to install. It goes anywhere between the tank and engine with no drilling. We use it on all of our company trucks. We have never replaced injectors on any of them and some have well over 200,000 miles. They get changed about every 20-30,000 miles for $16. Cheapest fix out there!
2004 - AFE Intake, no bullsh*t exhaust, steering stabilizer, 2" leveling kit, 48RE stock tranny, updated in-tank fuel pump, CAT 2 micron fuel filter kit, 35x12.5x17 Toyo M/T's.