i have little mods on my car only,
-straight pipe w/after market muffler
-10'mm silicone spark plug wire w/ bosh +4 platium
-grounding wire
-3 small breather
-air intake
-planing to put aftermarket pulley on but having trouble taking out the bolt that hold on the stock pulley...
what would be next to mod on?

 

here's a tip, use the search engine. this has been covered at least a dozen times.