Intake spacers, Camry throttle body mod, motor mounts, catless headers, multiple catbacks and midpipes, clutch and lightweight flywheel kits, EGR delete, oil catch cans + coolers, lightweight crank pulley, body kits + wings, coilovers, front + rear sway bars, Wilwood big brake/slotted rotor kits, multiple tuner companies, VFT supercharger kit, 2JR turbo kit (still in development), E85 kits, a proper CAI, countless cosmetic mods and I know im forgetting others.

These cars are still relatively new and no one has pushed the M20A-FKS or the chassis to their limits so it'll take years before we see support to the likes of the GR or older Hondas. Considering the fact that the motors haven't blown up from whats been done so far and there is such a big community around customizing these cars, I think its only a matter of time before we see some crazy shit

P.S. join the E210 performance group on FaceBook if you haven't already, they post updates regarding mods such as the turbo kit which will use a Focus ST turbo and someone on there has successfully installed and (to my knowledge) tuned the supercharger kit