He means, lifters and prods, springs if needed. possibly Timing chain and oil pump.
Only thing really required is hardend pushrods. UNLESS lifters are tappin, then go with LS7 or aftermarket for better quality control.
Big clay, I can tell you from exp, considering I have a 04 6.0 Denali, that Efans, exhaust, a decent CAI and a PROPER Aggressive tune, will WAKE that 6.0 up Drastically!
I had my muffler cut out and swapped in 2 18" dynomax bullets and had a pipe made to go from 2nd bullet out the back parallel with the OEM pipe over the axle. DONOT Use Dynomax mufflers! at least not ANY type of glasspack on the 6.0!!! it sounds like GARBAGE!
WAY to loud, pops rasps. if exhaust can do something that ppl hate, this does it!
HEaders are going to be a few months out as Callspeed is making some for us 4x4/AWD guys that wont require a sledge hammer to install them. So for exhaust this what i reccomend for you as it will be compatible with future mods (headers).
post ip some WTB of thevarious truck sites, Get a 5.3 Stock Ypipe, it should bolt right up to you OEM manifolds. this will allow you to run the Ebay MBRP 3.5", 304 stainless catback from ebay, its 385$ shipped. You will not find a better Catback for the price anywhere, and Corsa is just a name!
Once callspeed releases the new AWD headers, they will bolt right onto that catback, as you can see I have the 2wd set bolted on in that second pic. I am selling them due to fitment issues, which I knew I was going to have, just not how bad.
CAI, bud this is likepicking a muffler it comes down to user preference, they ALL give the same performance increase, some just dont heatsoak as bad as others. But look at it like this, that 70$ ebay CAI, with 70$ worth of mods, performs just as good as the 350$ Volant.
I'm sorry, I will mod my cheapie.
This is ceramic coated with 500* high temp header paint, then wrapped with DEI 2" header wrap. The boxis insulated with 1/2" thick insulation thats backed with thick foil. It is the insulation from the floor of my Old S10.
I can go out fora 30min drive, pop the hood and the outside of my tube andbox is smokin hot, but the inside is ICE! cold.
Efans, buy a set of used 05 Truck fans, they bolt in with minor mods, Or get the flexlite kit.
Either way, dont hook up the high speed tripper to the AC!!! Its loud as hell and you will constantly be turning AC off at drive throughs.
Instead get a 212 temp sensor or a adjustable set to 212 to trigger high speed.
A convertor? HELL YESS! Circle D 285mm 3200, will give you the biggest seat of the pants performance increase than all of the above + more! its 385 new..
Before you get a Tune, buy and install a Wideband O2 sensor, I run the AEM UEGO. Or your tuner is wasting your time.
More to come
Stay away from internal engine mods for now until you have done every external bolt on you can, then if you want more crck that baby open.