Swift SPEC-R Sport Springs - BMW M4 F82 15-20 carbon cooling plate These bosses are double drilled

These bosses are double drilled so work with both Nardi/Personal and Momo/Sparco/OMP steering wheels

Not for just power but for weight reductions and the best value for money product

Mazda Miata NA / NB

The package includes everything that is needed to install the product straight out of the box

Swift SPEC-R Sport Springs - BMW M4 F82 15-20 carbon cooling plate These bosses are double drilledFront (kg mm): 5 (279 lbs inch)Rear (kg mm): 13 (726 lbs inch)Front Drop: 28mm ( 1. 1 in)Rear Drop: 23mm ( 0. 9 in) Built for track duty, Swift Spec R springs are designed at the upper limits of the OEM shock valving. Track tested and tuned for optimum performance yet comfortable enough for a daily driver. Swift made Sport Springs keeps the quality ride you get from the showroom, and adds improved handling and lower ride height for driving enthusiasts