hey i just deciced to upgrade my 99 civic dx. i have already bought a mugen cold air intake and a apexi n1 muffler from ebay. I was wondering if these parts would be sufficient to notice any amount of power gain. also i was wondering if you could tell me what kind of parts i could get under a small budget ( i work 3 days a week :P ) that would enhance the performance of my car. without spending thousands of dollars