ModdedEuros
Go Kart Champion
There are a bunch of options on the market really. Just up to what your budget is
Solo Werks coils - budget coils. So obviously can't compare them to other ones. But we sell a ton of these and there is a red R in the product photos
http://www.moddedeuros.com/products/solo-werks-s1-coilover-system-s1vw007
H&R Ultra Lows
http://www.moddedeuros.com/products/h-r-ultra-low-coilover-tuner-fitment-10-12-golf-gti
KW Variant 1's
http://www.moddedeuros.com/products/kw-variant-1-coilovers-10210040
I know others have mentioned the ST and other options. Thought I would throw some more into the mix
Solo Werks coils - budget coils. So obviously can't compare them to other ones. But we sell a ton of these and there is a red R in the product photos
http://www.moddedeuros.com/products/solo-werks-s1-coilover-system-s1vw007
H&R Ultra Lows
http://www.moddedeuros.com/products/h-r-ultra-low-coilover-tuner-fitment-10-12-golf-gti
KW Variant 1's
http://www.moddedeuros.com/products/kw-variant-1-coilovers-10210040
I know others have mentioned the ST and other options. Thought I would throw some more into the mix