GM "hot fire" coil packs

[chuckmc8]

I saw this on an online ad and it mentions gm "hot fire" coil packs. I've never heard of these and my google search comes up with nothing. Here the text of the ad-

"This motor is a 5.3 Liter LS1 style V8 out of a 2002 Tahoe Z71, and is ready to drop into your performance muscle car or replace the tired motor in your 99-06 Chevy / GMC truck.

The 2002 Tahoe was the last year for mechanical throttle body. The ease of modification with mechanical throttle body makes this motor a great budget option for your LS1 swap.

This particular motor was the Higher performance 315hp rather than the more common 289hp 5.3. The 26hp comes as a result of the 32lb EV6 fuel injectors(as opposed to 22lb) and the GM "hot fire" coil pacs.

With Ecm tune, this 5.3 is capable of around 350hp. This motor responds very well to aftermarket camshafts with little mods due to the 32lb fuel injectors, making it able to achieve over 400hp with a cam swap."

Is this legit for 26HP or smoke and mirrors? It just looks like a truck 5.3 to me. I don't know what "LS1 Style" means.