pfi572
Active VIP Member
f150 doesn't need spacers if using there leveling kit as it is in the shock. With the Rancho i believe it comes with coil and the Bilstein you have to install the stock spring on shock and set at desired height.
Pretty sure you need to still have the spacers as well the extended Bilstein shocks are longer so you can avoid using the lower shock mount spacers that. Come with the leveling kit
I just put Bilstein 5100 on the rear of my superduty big improvement over the stock shock (not oem rancho) and will be putting them on the front when I. Need to and get rid of the lower shock mount extensions that came with my ready lift leveling kit
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