It looks like things haven't changed much, because the Nismo 370Z is again the heaviest manual transmission model. A spring designed for more weight or just for the front nose is highly likely....just like the Nismo 350Z.
2011 Nissan 370Z Coupe | Vehicle Specs | Nissan USA
CURB WEIGHTS (LBS)
370Z™
3,232
Touring 370Z™
3,278
NISMO 370Z™
3,300