Hi Brad, Leitner has indicated that wind noise was solved with a plastic strip that gets inserted into the top channel on the front piece of the frame. It is included when you purchase the rack. I also purchased 4 additional strips that are available in a set called the Wirelok Wire Guide System. The set of 4 is just $38. I installed one of them in the bottom slot of the front facing frame member because it would be difficult to add it after installing the rack. I am holding on to the other 3 strips for perhaps covering some channel openings or for concealing wiring or if needed to perhaps any wind noise down. The quality of the strips is top notch, just like anything else that Leitner makes. Although the 3/4 rack will add more weight than the Leitner Cross Bars, all the extra flexibility you get with the rack makes it a winner in my opinion. You can easily move, remove or add additional load bars to the rack at anytime without taking the rack apart or removing it from your Grenadier. If weight is a factor, perhaps the Leitner Cross Bars are the way to go, it not the Leitner 3/4 Rack is the way to go. Here's some links below. DaBull
Leitner 3/4 Rack Link:
PART # 00-GR3-4R-1748 Ships within 1 week of ordering! The Leitner Designs ACS ROOF is a product of 10 years, and hundreds of thousands of off-road miles of testing & learning from our Active Cargo System (ACS) modular truck bed rack & cargo system. The ACS ROOF Platform Rack for the Ineos...
www.leitnerdesigns.com
Leitner 3/4 Rack Installation Link:
Leitner Wirelok Wire Guide System, (4 extra strips):
PART # 00-WL460-1371 The WireLok wire guide management system by Leitner is a new way to rout your power cables on the ACS. Made from ASA composite the Wirelok snaps into place on any of the 20 T-channels on the ACS System. The WireLok offers the ultimate clean install without using cable ties...
www.leitnerdesigns.com
Leitner extra load bars for the 3/4 Rack link: Note: These are the same as cross bars that come with the rack.
39.75" PART # 00-39.75RLBK-1656 47.75" PART # 00-47.75RLBK-1657 52.75" PART # 00-RLBK52.75-1774 55.75" PART # 00-55.75RLBK-1658 62.75" PART # 00-62.75RLBK-1659 Your ACS ROOF Platform Rack includes four load bars. However, if you have large or heavy loads, we suggest you add an additional bar...
www.leitnerdesigns.com