Nup... The front and dump are identical to the coupes... This is how I describe it...
It goes: Turbo - Dump (short bit) - Front pipe - Cat - Cat Back...
The extra length is in the Cat Back section, but at the cat end, not the muffler end... You could always get someone to cut the flange off the end of the coupe cat back and add in an inch or so... But it works as is...
Front bar fits fine... 100% certain... Skirts are different, but a company up here make some lengthened GTR copies... Blits Motorsports Gold Coast... Around $300 a pair... Some Jap kit makers have sedan skirts too but way more pricey...
Rear bar doesn't fit at all without serious mods... Same goes for the rear pods...
Weight I can't remember off the top of my head but it's listed somewhere on the web... Wasn't that much more than the coupe... Around 70kgs IIRC...