can you use sedan Htech springs on Coupe? i think it's the mastery luxury one.

 

here is the difference in the spring rate...same part number but different setting?

Tein H.Tech Springs

Height Specifications

350Z: (Front: -0.3 in; Rear: -0.2 in)
G35 Coupe: (Front: -0.6 in; Rear: -0.3 in)
G35 Sedan: (Front: -1.4 in; Rear: -0.7 in)

Spring rates:

350Z: (Front: 358 lbs/in; Rear: 375 lbs/in)
G35 Coupe: (Front: 325 lbs/in; Rear: 263 lbs/in)
G35 Sedan: (Front: 325 lbs/in; Rear: 263 lbs/in)