Gonna take the other route and say it's entirely unnecessary for 99% of rigs, let alone 99% of 4Runners. Big 3 is already pretty unnecessary with 1 or 1/0 AWG, you'll NEVER ever in 100 years see anything even close to warranting such heavy duty cable - not even if you were running triple winches all at once - and especially so considering these do, what? Upgrade your starter cables and fuse box wiring? Yeah $145 well spent alright, people definitely have loads of problems with those...
And I say that as someone with a Big 3 made from 1/0 welding cable. The saying "just because it's sold doesn't mean you have to buy it" rings familiarly here to me.
To that, personally I think it speaks volumes when people try to sell these kits under the guise of "adding lights" down the road, because these people know very damn well how tiny of a load LEDs impart and how much of a non-issue that is. And if they don't... is that really someone you want to purchase and take advice from?