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I do not have clearance issues here. Reserving this spot to post some pictures under the IM with a borescope. Mine is a 2020 model.

You can use Permatex Orange, which holds somewhat like red but can still be removed with hand tools. It's specifically advised for NVH resistance, especially automotive.

Before you flash the first time, XHP backs up your OEM transmission tune.

I admit that this is louder than I expected, but smartphone cameras have a way of wildly distorting the apparent volume. What would help is a video in the engine bay. Get the phone close to the grey plastic cover on the side of the throttlebody. Then try to point the phone down lower underneath...

The different shift maps determine at what RPM the car changes gears, offset from the factory shift map. As a completely made up example: if the car ordinarily shifts from 3->4 at 3000 RPM and you change this by +20%, the car will now shift at 3600 RPM. The different pre-programmed maps allow...

The water pump on this car is electric, and is very high-pitched. The throttle body also has a high-pitched whine when electrified. Constant tone.

Go to the specs for the wheel. Locate the "center bore" (CB) or "hub bore" (HB). This will be listed in millimeters. The Supra is 66.5mm CB. If your wheels are larger than that, you need hub rings that are 66.5mm on the inside and exterior mm that match the listed CB of the T5R. For example...

Cold coolant and hot oil = happy car.

Bigger manifold for IATs. Almost nothing else matters

Those DME connectors are a pain in the dick. Who designs a connector with a positive lock that can click when it's not locked? Oi.

I think all the track guys would say: Verkline for any core alignment arm (toe, camber, caster) is a must SPL or SeemsLegit Garage for traction arms is probably fine

This is the Precision Raceworks AFS.800. The system has two Walbro 535 pumps in the tank, plus the OEM pump. The OEM pump only feeds the DI system, and the two Walbros only feed the PI system. It's a "regulated" system, meaning the fuel pressure is adjustable to hold a very specific value, then...

Use a dead blow hammer and beat the ? out of it

I admit this looks suspicious to me, too, but you could get a conclusive answer with one of those NOx detector tool things. It will change colors if combustion product is in your coolant mix.

The extent to which Toyota phoned it in on the cabin experience never stops amazing me.

New fuel system!

Yup.

This is my theory also.

Upgrade your front sway bar. Z4 is a touring car. It's designed to be soft and lazy for driver comfort.

I am familiar with Megan and Godspeed from the Genesis Coupe community, which tends to attract entry-level mod budgets. Godspeed is reprehensible quality with a rich history of premature failure and poor QC; absolutely worse than OEM. Megan is serviceable with a fine reputation on the street but...