Here's one of those W T H? things I've found... PAC 1243 springs coil bind specs vary depend on where you look: https://www.racingsprings.com/index.php/valve-spring-11301.html - says 1.053" https://www.racingsprings.com/media/wysiwyg/2020_Master_Catalog_FINAL_Web.pdf - pg 14 says 1.070" - pg 15 says 1.150", yet their chart still gives a rating of 653 lbs at 1.150" The set I have measured 1.150" consistently. What's it say about... whatever... when the manufacturer's specs aren't even consistent or correct? 
2021 Challenger 6.4L Scat Pack 1320
100% stock: 1.680, 11.894 at 113.75 (DA 175 ft)
weight reduction, wheels, tires, Hellcat air box: 1.661, 11.686 at 115.97 (DA 710 ft)
1973 Challenger 452 ci street/strip [2008]
pump gas, DOT radials: 1.454, 10.523 at 126.44 (DA 514 ft)
| 
