SpecE30 rules now allow the use of a Ground Control coil over conversion instead of the H&R Race springs (the H&R springs are still allowed for the 2018-2020 seasons). The new Ground Control SpecE30 springs are 525lb/in and 700lb/in - a lot stiffer than the previous Race springs. And with smaller diameter springs more negative camber is available.
This kit includes the required spec front and rear springs, front coil over sleeves, front spring seats, rear spring locators, and rear height adjusters. The front is converted to a coil over strut by adding a threaded sleeve to the stock strut housing. No permanent modifications to the strut housing is required as this kit fits with the existing original spring perch. The sleeve is just the right height to fit on the strut housing between the upper gland nut and the factory weld for the stock spring perch. This still allows access to the gland nut even with the sleeve in place. Removing the stock lower spring perch is recommended to allow better access and more wheel clearance. This kit is designed to work with the Ground Control SE30 camber plates or stock strut mounts.
In addition to the SE30 class this coil over conversion allows you to corner balance the car and run different 2.5" springs for different events and not be tied to the previous fixed spring setup.
E30 (84-91) > 325i
E30 (84-91) > 325is
E30 (84-91) > M3