Just installed an S&B cold air intake #75-5103D with the (white) Dry extendable filter. Got it on amazon for 399$ same price as the S&B website , but shipping took 2 days with prime , S&B wanted 40$ to ship it standard. Installation was easy , and it looks really nice under the hood in my opinion, but better yet I can definitely hear the turbo whistle even more than stock. I still have the DPF and the catalytic behind the turbo so its not a nice full flowing whistle , but its loud enough to make me smile lol. Just wanted to create this thread for those with a Duramax (L5P) that were wondering on this CAI. I recommend It, I know is pricey , but most mods to these truck are. LMK if you have any questions ??