Pro Speed Exhaust
KTR Induction Kit (though I'm now using the stock box again with a washable panel filter. OEM+ ftw)
98Ron Map
Trophy Turinis
LED Dash Mod
Stumpy Aerial
Pure Motorsport Top Mounts
Eibach Sportlines
That's a few of what I've done to mine for ideas.
But to echo what was said earlier, it's not about adding moar, it's worth refreshing what is already on there like the dampers, shocks and maybe some bang some solid top mounts plus refresh the track rod ends and any other bushes you can get to while on the job. I refreshed my suspension setup the beginning of November and I'm still grinning when I drive it. It's so responsive.
The car will feel like an animal then, not just sound like one.
Get under the bonnet and give it a clean maybe too. Less is moar.
Most importantly learn to fully exploit the power of the 182. There's a lot of power to be wrung from these little cars.