Where to start
 

I want to do some performance upgrades just wondering what everybody doing for upgrades meaning intake, downpipe, exhaust , tune help please lol

I would start with scrolling through and reading a bunch of posts in the SS specific forum (where you posted this thread). It's not like SS modders are bashful.

https://www.chevyhhr.net/forums/hhr-ss-45/

Going from stock, I just did the mild stuff listed in my signature.

And, as donbrew stated, start scrolling. We've been discussing SS mods since they came out in 2008. By searching, you'll find tons of old "mod" threads. Lots of those old thread members aren't active here anymore so you'll find lots of stuff that won't get answered in a new thread.

Glock 19 in pocket :lol:

That was the single biggest upgrade I have ever read.

Is it Matte black?