Thanks for this info, I've been mulling between AA, AMS, and CG Precision for a catted DP. Lately I had been leaning CG Precision because of the increased airflow which someone else also wrote above.
Do you have specific experience with the CG Precision? Can you comment whether you have...
Can also confirm that the 2 on the bottom of the pack of 4 from the Amazon link were unlabeled / blank, and perfect for use... Only used a pair of snips / sidecutters to remove about 3/8" from the bottom. Drove around at about 65mph with no buffeting, only standard wind noise, couldn't be...