STOCK... best bang for no buck... i dont think any one has seen any huge gains with any aftermarket intakes for a decent price... i rather spend $200 on something that will give me more "bang for my buck" than an intake...
watch it, i've seen a few people too ignorant to take off the CAI extension and hydo-lock their engines with the K&N. So if rain or big puddles, please take off the CAI extension.