Anyone know of any efi live tunes out there for a lh9? Not that I am aware of. Caused me to look for an 09 Alpha Offroad which I just found and bought this week ... just had to have Black.
If you had a local tuner, they might be able to do that, but you would have to ask them. 10s are so low production, I do not see it happening soon.

What about intakes, just an airdoc ... Yes, Volant gave up after fitment issues like 8-9 years ago.

is there a better filter than stock? Yes, a lot better. AFE Pro Dry-S (washable synthetic no oil) and K&N (washable oiled cotton gauze requiring re-oiling).

Are electric fans worth anything? Absolutely. I have been running a PCM of NC, Inc (formerly PCMforless) for almost 10 years on my 07 and it will be moved to my 09 Alpha real soon.

Lastly, is there a complete exhaust system that removes all the cats? No, it is illegal to remove cats. If you mean replace, NO. That would be a local one only custom exhaust job. There are some Cat Back kits.

Taint had a nice 10 he recently sold, he might know more about possible tunes.

I agree with pretty much all the previous responses but will add these comments:
One of the best things is to get rid of the "squished" crossover pipe under the transfer case by going to a catback system such as a MAGNAFLOW. I'm pretty sure it is worth at least ten hp.. A few years ago, I had a GM engineer tell me that the exhaust system was the primary reason the ALPHAs were rated 300 hp. vs 310 for other 5.3's of the same vintage.
You might consider contacting BANKS about a program for the AutoMind # 66112. They are great folks to work with and arranged for me to download a tune (engine and tranny) that I am super happy with for my CE. I have messed with a lot of chips/tuners/programs over the years for different rigs and this one is by far the best!

I have the MAGNAFLOW on both my alpha and CE. The fit is perfect and the sound is great (you can hear it but not annoying loud and no resonating) . Also, the stock resonator is a no resistance "can" and is on there for a reason. Just eliminatin it will cause a harmonic that you probably won't like and no improvement in sound. I have used header wrap on the crossovers because the full diameter is closer to the transfer case tailpiece. Whatever you do, I think that getting rid of the restrictive crossover is more important than any other exhaust modification.
Best of luck on whatever you decide to do!

Dont think BORLA made a CB for the ALPHA. If you decide to go with the MAGNAFLOWW, try ordering through WALMART and it will save you a few bucks.
Again, best of luck.