Torque Monster· Registered
False info, the 03 cali was a 235hp edition truck and anything other than that 03-04 that had the 250hp motor was the SO, the 305hp 03-04 was the HO motor in the series, every motor in the 04.5+ series went to 325hp there is no HO motor for the 04.5+ series although they did change the TQ ratings on the 05's+ from 600ft lbs to 610 ft lbs (i believe thats when they changed it), other than that they are all equal. The 2003-2004 Trucks have 2 injection events and the 2004.5+ have 3 injection events. The 2004.5+ is an awesome motor to get power from if you are going to just throw a tuner, exhaust, and CAI on it and be done with it, The 03-04 are not as responsive to tuners as the 04.5+ due to the 3rd injection event in the 04.5+ trucks, when ran with tuners they run hotter than any 03-04 which cause melting issues, also the 03-04 had weak valve seats and common injector probs, but the seats only drop when under High Heat. Which in an 03-04 getting it hot with the proper mods is not easy to do. Also the 03-04 get better mileage due to the fact that they only have 2 injection events rather than 3, such as 04.5+. The 03-04 have a mechanically controlled wastegate, whereas the 04.5+ have an electronic wastegate. Also like I stated before, the 03-04 are not as responsive on tuners as 04.5+, but when the 04.5+ reach 800-900hp they stall, there has not YET been an 04.5+ truck (325) that has reached 1000hp+ on #2 only. The 03-04s can and do, do it.:thumbsup: Anything else just ask04.5 went to the high output version.
Eric Brown 1138HP #2 only 2004 305/555