Ok heres what I recommend, if u don't mind spending $200+ on the zex adjustable heater then go for it, the $150 cheaper thermo one I dont advise u to get, I replaced it with a coldfusionnitrous.com 250w heater and that works great $60 and a blanket fro jeggs,com for $24, but ur gonna have to keep an eye on the pressure cause this one does not turn off automatically like the other two.
The spark plugs I got from summitracing.com, I got everything from there actually except the heater from eBay, and ya the traction control module ( window switch) is a must even if u have auto trans, u can control precisely when to activate and which gears, comes in handy if ur gonna run bracket racing

, if ur planning on hittin the track get the blow down kit as well.
The remote bottle opener I didn't get cause I figured Im not gonna spray on the street so i'll save the money, I also read that sometimes it does not fully open the bottle to the max and can cause issues but that could be all BS

, Instead invest in a purge kit, ur gonna have to clear the line before u spray specially when it's hot outside and the bottle pressure is high, I got the dual purge kit it'll give a nice show lol
And also recommend u invest in an AFR gauge, this way u can monitor ur air fuel ratio so u won't run lean or too rich, I got mine off of eBay at a good price, and don't forget the tune as well, so u can retard the ignition timing.