Hmmmm...with a thousand dollars, I would say your best bet is a nice COMPLETE tuneup, DC sports header, and a nice catback exhaust. that, in combination with what you have already, should give you some 7-10+ hp at the wheels which will be noticeable. Your other option is you can get a complete nitrous system installed for about 1000 $. That will give you the most bang for the buck....