New composites-based drag reduction kit for Boeing 737 NG receives

Aero Design Labs’s ADRS-1 kit includes revised fairings and vortex generators to save $12,000 in fuel and >40 tons of CO2 per aircraft per month.
Aero Design Labs’s ADRS-1 kit includes revised fairings and vortex generators to save $12,000 in fuel and >40 tons of CO2 per aircraft per month. 

Could small ventral strakes be added to the 737 Max to counteract the effect of the forward-mounted engines? - Quora

Why doesn't Boeing use a 757 fuselage with new composite wings (like the 777X) to replace the 757 (see comment)? - Quora

ADL Upgrades Boeing 737-800 Drag Reduction Kit With -700 Data

Airbus delivers record 718 aircraft amid strong sales - Leeham News and Analysis

737 Next Generation Design Highlights

Easy Jet – KAPLANIAN REPORT

All Boeing 737 NG To Have Redesigned Engine Nacelles Following Deadly Southwest Incident

SA Flyer Magazine August 2023 by Flyer & Aviation Publications - Issuu

Why did Boeing return to a cone-shaped fuselage tail for the Boeing 787 after using a wedge-shaped tail on the Boeing 777 airliner? - Quora

Inside the Quest To Build a Better Wing

737 Next Generation Design Highlights