Would these be good mods to start with?

SeeThruHead

1. bushings
2. motor/diff mounts
3. wheels/tires
4. coilovers
5. suspension arms/bushings

should increase your performance more than any meaningless intakes.

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filip00

Maybe a stupid question, but what sort of improvement or change do you see when changing motor/diff mounts or subframe bushings?

JARblue

Handling improvement. All other things being equal, you will have better transfer of power through the drivetrain with stiffer mounts and bushings. Rubber mounts dissipate energy during chassis movement, providing more comfort.

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SeeThruHead

IMO a drivers car is about getting the connection and latency down between the driver and the car.

Like a PRO GAMER... you want the latency between your actions and their results to be as fast as possible.

In addition you want the stimulus coming from the car (via the tires etc) to be transmitted to you as quickly and accurately as possible.

The problem with the Z imo from stock is there is considerable delay from when you give the car inputs to when they take affect.

Like throttle input takes half a second before the car does anything.

This is partly due to the ECU, which can be fixed via a tune.
And partly due to flexible bushings and mounts.

When you apply throttle, the engine flexes in its mounts first before delivering the torque to the drive shaft.

Then the diff flexes in its rubber bushings before delivering torque to the axles.

Stiffening up the bushings really reduces the latency between your input and the car actually doing what you told it to.

https://youtu.be/9YyDH1-BR5o?t=976

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