I beg to differ...
The Kenne Bell kits are pretty much plug and play. No drilling oil pan, thorough instructions, injectors, CAI, hoses, idler pullies, boost a pump, fuel rails (if needed), vacuum hoses, heat exchanger, MAF, special tools, tuned chip... everything EXCEPT the throttle body.
I don't contest the fact that they are complete or even high quality....only that the Tork Tech kit comes at a lesser price, with better parts as standard equipment.
For example...The large oval bore throttle body and inlet will support a larger volume of air and is more streamlined to increase velocity than the standard KB round inlet. It won't affect the quality of the kit, but you're leaving a few horsepower on the table on the big end and if boost levels are every upgraded, the more restrictive flow of the KB inlet is going to make itself even more apparent. I also forgot to mention the fact that the Tork Teck kit comes standard with a large diameter big tube inlet and 90mm MAF.....components which you probably already know are optional at an
added cost with the Kenne Bell....which drives the cost up even further from the standard $4,999 price.
the standard injector size with the Kenne Bell is 36lb/hr where the Tork Teck comes standard with 42lb/hr units. It may not be a big deal for someone who plans on sticking with the stock 9-10psi boost levels, but anything more than that and you might find yourself running out of injector....where the 42lb/hr units will take you well up to the 500hp mark.
The heat exchanger for the Tork Tech is much larger surface area, with a higher capacity and therefore more efficient by comparison, which will control discharge temps more effectively than the Kenne Bell unit.
The Kenne Bells fuel pump upgrade is not a fuel pump upgrade at all. The Kenne Bell kit comes with a Boost-a-Pump wire in unit. Not a bad set up (I've got one myself) but hardly a worthy replacement for a real large capacity fuel pump. I haven't had mine long enough yet to question its performance, but it works simply by increasing the voltage to the stock pump. I neat idea, but I would image in will have an effect on pump longevity in time.
Finally, the Tork Teck comes standard with a separate 8-rib belt drive set up. As I'm sure you know, an 8-rib blower drive system is better at reducing belt slippage than a standard 6-rib system (like Kenne Bell and most other systems are equipped with). Not likely a problem if one never plans on upping their boost levels, but an issue if you get any smaller than the standard supercharger pulley. Another nice feature of the separate belt drive is in the even that you ever did break the serpentine belt (which is more with blown applications) it won't leave you stranded on the side of the road like it would with a uni-drive system, since you've got nothing to turn the water pump without it.
Again, I don't deny for one second that the Kenne Bell is a great kit with a good design. I just think the Tork Tech designers picked up where the Kenne Bell kit left off and improved on its shortcomings to make a better one at a more consumer friendly price.