rear coilovers

does anyone do any rear coilovers for a gti that doesnt involve modifying the inner arch other than the top mount?

no

Hotbits did one, Dont know if mods are needed though?

Also check out Avo. They list a kit for mk2 swift but prob actually mean new sport! Also not sure if its rear coilover?

Good luck

There was a height adjustable kit available years ago which sat between the coil and lower erar arm, it was threaded and thus adjustable, no mods required and utilised the original structural points and rigidity
something like this
http://www.corbymotorsport.com/suzuki-swift-05-vmaxx-coilover-kit-p-4825.html
might be able to adapt something from a VAG product as they seem readily available for them
GTP