NTMD8R

So I have a 2014 Z51 MN7 with MRC.
We fundamentally do autocross .... a lot.... 25 events this year.
We are quite pleased with the cars abilities, with OEM tires (when the weather is hot.... when it is cold, that's another issue).

I am getting larger wheels (19x10 front, 20x11 rear (versus 19x8.5 and 20x10 rear stock).
I will run Toyo R888 tires (315x30x20 rear, 305x30x19 front).

I have 1.7 deg camber front, 1/16" toe out front (on each wheel),
and 1.2 deg camber, 0 toe rear (on each wheel).

So, what would anyone recommend for any suspension improvements, to make it handle even better?

I hate the thought of replacing the MRC shocks with coil-overs.
Also that would probably lower the car too much so it would rub.

But.... springs, sway bars, etc. ???????

Ramo7769

If you want to keep MRC, I'd recommend keeping your spring rates and playing instead with sway bars and alignment. There's a lot to be had there. And then you're not changing well paired items like spring and damper.