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.
I'd say go with a lid, filter and headers. Jet-Hots are at the right price of $500 + install. A nice flowing catback wouldn't be a bad idea either. All that may put you just above 1G though.