I agree, I'd get the tune first too. But I had my LT's before I had a tune. I did have a cel for the rear o2 sensors. But the nonfowlers did eliminate it. And my truck ran great.
This is not true. You may get a code for the rear o2's but there are tricks to eliminate them. Stacked non-foulers being the most common. I ran my LT's without cats using the non-fowlers and the code would come and go. But the truck ran great. I wouldn't even consider shorties.
I dont think they make the one you need anymore. Look in the classifieds here and other forums. Im using Diablo but my truck needs custom tuning to run. Look up Redtruck-VA or Tomater03 they both have an 03 and can tell you which superchips to get..
Superchips and Diablosport are both programmers. The Diablo allows for custom tuning if you plan to go crazy. The superchips does not allow for custom tuning. But the Superchips has better canned tunes and also has a trans tuning option for the 03 where Diabl does not.
For the 03 if your not planning a whole mess of performance mods the early model Superchips will be your best option. I dont recall the model number off hand though.
You will have a coil over the primary plug. The wires go to the (waste spark)plug on the opposite side. I'd recommend doing them 1 at a time as to not mix them up.
You will be hard pressed to beat Moes pricing. And if you find one cheaper verify shipping. Shipping is free from Moes in the lower 48. You can buy the Diablo without HemiFever tuning. Its a drop down menu.
If you can deal with the downtime, sending your stock TB to Fastman will be the cheapest route. The standard bore if you don't plan on opening the engine. True bore if you do. It is a supporting mod and you won't notice a big difference by itself. But i would do all the bolt ons before opening...
Moes Performance, Matt is a vendor/member here and a great guy to do business with. But be careful you may find yourself in more debt once on his website....lol
I would say the performance 93 would be the best. Or a variable of that. I'm not familiar with super chips. When I was running the canned tunes in my Diablo I felt the best performance running the 91 tune with 93 octane gas.
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