I threw my 6637 out i was gunna do the same thing bought the filter and a 90degree intake boot elbow. But didint wana spend the cash the truck shop wanted to bend my 4 in pipe so its on my buddies cummins now i do wana know how it helped your temps as i never got mine done nice job seeing it i regret trashin mine now

 

temps are good, did some freeway driving today, never broke 600 and i was on it. ill post more info as i get it, ill do an up hill pull soon and see what numbers i come up with. too bad you tossed the 6637. i looked at my filter mount bracket today and i imediately lost motivation... injector lines scare me.

 

Can you give me the diameter for the turbo. Cant find what exact part I need