When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
Get a Torque Arm Insert. I got the NM and love it. Search the forums for it but it's only like $60 and very easy to install and you'll notice a big improvement in your shifting and even power delivery right away.
A rear sway bar is only in the OPs budget if he's going to install it himself. I had a 25mm installed and can highly recommend it!. The faster you push the car into corners, the tighter it plants itself on the tarmac.
One cheap and easy upgrade would be a K&N drop-in filter.
Go for a Helix short shifter and an NM torque insert. You can do both of those for $150 if you do your own install. The torque insert will only take 15 min. The Helix will be about 1 1/2 hrs. Both will require the car to be on jack stands or ramps. Lots of info here on both installs.
A rear sway bar is only in the OPs budget if he's going to install it himself. I had a 25mm installed and can highly recommend it!. The faster you push the car into corners, the tighter it plants itself on the tarmac.
Not for less than $150. I just installed the DDM intake ($230) and it is excellent. A little more grunt but a bunch more growl during WOT. Now it sounds like it should.