Finally finished this. It's far from perfect and I have some trimming to do but it seals nicely (there's a rubber gasket underneath). It's just 1/8" ABS plastic bent with a heat gun and cut appropriately. Not sure it will help a ton but should at least be equivalent to stock now with hopefully better airflow.
(https://uploads.tapatalk-cdn.com/20180613/72d4767579c9bb5577ccc3018a2c0f50.jpg)
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Looking forward to results/experiences/opinions!
X-2 Looking forward to your initial thoughts! Dave Best of luck. Z :)
Looks good!