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Just to clear up some part number confusion B58B30M1 = B58C = headifold "2020" version B58B30O1 = B58D = 6 port "2021" version source: BMW engine code nomenclature HTH

I can't watch Dougs video's. His voice sounds like someone farting through a trumpet and his head looks like a foot. EAD.

yep, to fix properly would be cheaper for insurance company to replace the car

I sold my W204 C63 AMG to fund the A90. No regrets. I love the C63. Brutal, analogue, sounds absurd. Love it. The A90 is just as fun - in a different way - but no regrets. Would own another C63 in a heartbeat if I could afford it and had the room.

ynguldyn is a prominent member of bimmerpost and has a long history of reliable insider data regarding production and model changes plans.

Sorry, I thought the GT4 was running the B58C AKA B58B30M1?

Yeah, I haven't had the fun of a stock JZA70R.... My A70 is a stripped 1JZ single turbo and it's an absolute delight to drive on the limit. Adjustable, predictable and capable. I'll add more later- but stock vs stock, 2JZGTE VVti vsB58, The B58 is a far more visceral, angry and fun engine.

I really should do that one day.... Stock vs stock (all supras) the A90 has them all beaten. A80 in second, A60 in third, A70 in fourth..... A40. Biggest thing jumping into A80... was how more GT it feels. softer, softer steering, slightly more numb. Even with brand new HKS Hipermax IV coils...

I,ve been driving my A80 for the past 3 weeks after a month of driving the A90. Very interesting to compare the two! (and A70 before that)

Transmission manufacturers will rate an input torque for a given reliability/longevity perspective. We rate our transmissions at 1000Nm input torque (vastly less than wheel torque). Keeping in mind the V160/161 is only rated to 450Nm.

The GT4 Supra runs the B58C. 420hp in an enduro race trim. Speaks volumes of Toyota's confidence in the B58C heat management

I think they're old pics guys

Not starting to feel any choking due to the headifold? I'm assuming you'd see MAF and IAT decrease/increase accordingly?

Great work AU/NZ team

https://media0.giphy.com/media/jOpLbiGmHR9S0/giphy.gif?cid=ecf05e476518dc8c192a1884445b57475050a5a94a27e9f6&rid=giphy.gif

B58B30M1 in the GT4 demonstrates how Toyota thinks the headifold will affect performance, reliability and thermal management! Edited to to wrong engine code

Came to here to correct myself - noticed in the rear view camera today the valve was closed on cold start (condensation only on LHs of car)

Yeah, it is pretty restricted. 87dB is the limit for post-1983 cars if I recall correctly. Plus, having a modified car puts you in elite criminal bracket unfortunately haha Yep, I have never seen it closed.

with respect to the crackle tunes - i think Au got a mix between the new and first year car. We get a lot of crackles, but they're not gunshots. a little more subtle. you get the occasional gunshot when the temp differential (it's freezing cold, or muffler very hot) is high

If anyone in the US has a rear muffler they'd like to donate for science, I would like to compare the AU to USA rear muffler