These brackets lower the entire original foot-peg brackets. They are the black brackets.
I tried them on someone elses GTR1400 and loved them as they move the pegs down about 35mm (1 3/8") but they also move them slightly outwards.
However, when I went to fit them they fouled the exhaust link pipe for my Remus Hexacone system.
Would be ideal for someone with the stock exhaust or with an aftermarket exhaust that doesn't angle up until behind the foot-peg.
Asking £60 delivered to UK (cost me £110 from USA) or to EU with you paying the extra shipping.
The AST details are here
https://www.advancedsporttouring.com/Concours_14_Foot_peg_Lowering_Brackets_p/c14-27.htm (https://www.advancedsporttouring.com/Concours_14_Foot_peg_Lowering_Brackets_p/c14-27.htm)
and the installation instructions here
http://advancedsporttouring.com/v/vspfiles/instructions/Rider%20Lower%20Bracket%20Instructions.pdf