997 Turbo DIN weight of 1585kg is with standard brakes(and standard equipment-Navi, Bose, Electrical seats etc.). So, by specifying Buckets and PCCBs you can lower the weight for almost 20kgs(of course, if you do not add tons of leather)....

Regarding leather-just leather roofliner weights 2kg more then standard alcantara!

You want 1440kg 997 GT2? Order basic car without any additional options. Just Navi with HDD is almost 10kg in total(did you see the parts? I did...)...