BMX - New and need help

Hi guys im new here. Ill be 14 in November and im going to start BMX racing. I have a Haro comp SX but I recently found out it was the cruiser version. So it'ss pretty heavy, much to heavy for me to race with. So I was thinking im going to buy parts and build a race bike. Heres my parts list:(if I need to make changes or add anything could you guys let me know)(all parts will be ordered from dans comp)

Redline 2007 U6 frame 224.99
FMF power moto pro bars 32.99
Animal red bar ends 15.99
T.H.E. bike stand 32.99
FMF powermoto V-brake kit 49.99
Tektro Talon red/black brake lever 9.99
Shadow conpericy interlock 2 chain 28.99
Redline red chaintensioner 9.99
Profile 43 tooth chainring 32.99
Sinz expert crank arms 165mm? 49.99
Redline device frork 69.99
Lizard skins red grims 9.00
Do I need a head set?
Lizard skins number plate 15.00
Animal hamilton red pedals 55.00
Odessey junior red/black seat 22.99
Shadow conpericy dark red umbra seat post 33.99
Shadow conspericy dark red seat clamp 9.99
Shadow conspericy dark red attack stem 44.99
Haro catapult tires (front and rear) 13.99 ea
Alloy hex dome red valve caps 2.99

Hello xoxide, this would be better answered in the BMX forum, but Welcome to Bike Forums!

East Hill

Going down the list:
Skip the bike stand for now. Use the money on something you NEED.
Skip the Tektro Brake lever - the FMF kit comes w/ a lever.
You'll need a Bottem Bracket (BB) for the cranks. You need a euro BB.
You need a headset, integrated.
Get a different chain. If you're racing, you won't need a Shadow Chain, Get something lighter. Plus teh Shadow Chain is known to stretch.
Wheels? You'll need those.
And I'd look at a different fork.
-Bill

Thanks for the advice guys!
Ok to answer the question about wheels ill use the ones from my haro and just switch the tires. What kind of forks should I look for? And what size cranks do I need?

Well, you say your Haro is the cruiser version. That has 24" wheels. The Redline needs 20" wheels. so you're gonna need a good set of 36 spoke 20" wheels w/ 3/8" axles.
I say you don't want to skimp on forks. You can't go wrong w/ Odyssey Race forks. You'll want forks w/ dropouts for 3/8" axles. NOT 14mm. Also - look for a fork w/ a built-in compression device for the headset. Makes things alot easier.
Cranks - don't know what size you need. Depends on how tall you are & what you like. I'd say find out what size cranks are on your Haro. Are those comfortable? Then get that size. They feel a little long? Then look at something shorter. Just guessing, I'd say - 170 or 175.
Also - just because your Haro is a cruiser, don't mean you can't race it. They do have a cruiser class.
-Bill

Make sure you get good forks. Don't get the Shadow chain, screw the bike stand and Tektro brake lever, get some IRC Siren tires, get a bottom bracket, and check your crank length. I'm 5' and need 170mm cranks.