iFixit finds a plethora of minor tweaks inside the 2013 MacBook Air | Ars Technica
Amazon.com: Timetec 1TB MAC SSD NVMe PCIe Gen3x4 3D NAND TLC Read Up to 2,200MB/s Compatible with Apple MacBook Air(2013-2015, 2017), MacBook Pro( 2013-2015), iMac(2013-2019), Mac Pro(2013), Mac Mini(2014) : Electronics
MacBook Air 13" (Mid 2013-Early 2014) 1.3 GHz Logic Board
Is Macbook Air 2014 RAM upgrade from 4GB to 8GB possible? - Quora
How to Upgrade the PCIe SSD in an 11-inch MacBook Air (Mid 2013 – Early 2015) on Vimeo
Teardown of New Mid-2013 MacBook Air Reveals Smaller SSD, Increased Battery Capacity | MacRumors Forums
Upgrading Ram in a Macbook Pro 13" | How to Upgrade Ram on 13" Macbook Pro - YouTube
How To: Replace the SSD in your MacBook Air 13" (Early 2015) - YouTube
Amazon.com: OWC 480GB Aura Pro X2 SSD Compatible with MacBook Air (Mid 2013-2017), and MacBook Pro (Retina, Late 2013 - Mid 2015), and Mac Mini (Late 2014) : Electronics
Lab Tested: The ramifications of additional memory on a Mac | Macworld
Amazon.com: M.2 NVME SSD Convert Adapter,NGFF M.2 NGFF M-Key AHCI SSD Convert Card for Upgrade MacBook Air Pro Retina Mid A1465 A1466 A1398 A1502( 2013-2017 Year) : Electronics