they are exactly the same dimensions everywhere, only difference is the kong labelling and support, if I have an issue, I go to kong and they replace it
if you have an issue with the nick williams who does the support? the third party vendor and good luck with that, watched a shop eat shit with bbk and granatelli throttle bodies through no fault of their own...
williams
https://williamsperformance.net/ does not do direct sales
kong has been the one company to stand by their product and my 2.4 on my hellcat can be spun to hell and back and not even break a sweat, the cooling bricks though can't keep up, but we'll be fixing that soon: ts/mopar/noforn readins required