Amazon.com: Gaming Driving Force Shifter Modification Kit, Logitech G Gaming Gearshift Sequential Upgrade Adapter, G25 G27 G29 G920 Driving Force Racing Wheels PS3 PS4 Xbox One PC Racing Game Shift Rod Damping
Obokidly DIY Sequential Shifter Knob mod Upgrade Modification Steering Wheels Accessories Parts Set for Logitech Shifter Gear Shift Knob for G29 /G25/G27 (Only Black Sequential Shifter Knob Mod) : Amazon.co.uk: PC & Video
Sequential shifter mod for LOGITECH shifters. G25, G27, G923 etc,. Sequential, Handbrake, H-pat. - YouTube
It ain't stupid if it works. G29 Sequential mod with rubber bands : r/simracing