[oldman]

Now they have no credibility so we can't believe it when they say it'll have +60 hp.

I don't know how you come to that conclusion, the 6 port head has more power than the 2 port head. I believe it is like 480 on the M over 500 HP on the comp package. I think it is very credible that the 2020 Supra will have a significant power jump. Toyota said they would continue to upgrade the Supra.

And for a car they claim is "ready to be modded" apparently what they had in mind is removal of the OEM drivetrain, as that does NOT look mod friendly to me.

The initial Supra looks limited, the 6 port head looks like it will be easy to get 600 stock cid to 700hp big engine HP out of it pump fuel. It is a DI FI BMW engine so it maybe mod friendly, but it ain't gonna be cheap. VTEC BTW takes to FI like a duck to water... Don't know how strong the BMW drivetrain is, in general it ain't as strong as a US Muscle car, when it comes to drag racing (not what it was built for).
Not saying the Supra has the S58, just saying that the BMW inline 6 family has big HP potential (less so for the 2 pot head).
S58 here:


Here they clearly speculate the S58 could make it into the Supra:
https://www.topspeed.com/cars/car-ne...-ar186001.html
"BMW might want to keep the S58 for itself for a few years, but it could offer this engine to Toyota further down the road"

"But will it be as powerful as the M Competition models? It’s difficult to tell at this point. If Toyota gets approval for the lower power version, which seems likely, it would be more than enough to push the high-performance Supra well above the existing six-cylinder model. At 473 horsepower and 442 pound-feet of torque, the high-performance Supra would deliver an extra 138 horses and 77 pound-feet over the existing model. The extra oomph will also shave at least two tenths off the current 0-to-60 mph time, reducing it from 4.1 to 3.9 seconds. Now that’s a goal we can all root for!"

guess when it comes out somebody has to peak in the hood and count the exhaust ports...