Called H&R. They said they dont release the spring rate because the way they test the rating is different to others. They include the bump stop to their equation. They did say it is stiffer then OEM.
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12 370Z- Touring- Sport- 6MT- 
Z1 Anti Starv, 34R Setrab Kit, 20/25MM | Konig 18x10.5 W/ Hankook RS4 | PowerStop TrackSpec Pads | TTP Single Exit , & Swift Springs | Previously Owned: 18 Q50- 480RWHP- 12.2 @118- Sold, 92 240SX Built SR
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