Use the GT seat back bolted onto the 4paw seat base and rail, swap the fabric over. Easy days. Exhaust wise is has to be custom, but you can get a 2.5" over the rear axle. Even with 4paw Meisters at the lowest setting. Suspension, its only the rear which is different. Normal coilovers do fit, just the back can sit a little high. Apart from that basically ever other mod you can do to a GT / Glanza you can do to a 4paw. With the exceptions of, Front lsd Aftermarket arbs Rear disc Oem rear strut brace Some aftermarket braces Maybe some other shit. Dont forget anything can be made custom to work