Mount the front lower control arms to the chassis

~30 min2/5

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Watch out

Torquing the bolts while the arm is hanging at an odd angle pre-loads the bushing and shortens its life. Hold the arm parallel to the ground before final torque.

Mechanic working underneath the front of a vehicle chassis. — Reference photo (Unsplash) — placeholder while Factory Five image permissions are pending.

Tools you'll use

7/8" socket
15/16" wrench
ratchet
torque wrench

Parts from your kit

supplied LCA mounting bolts and nuts
large supplied washers for the rear bushing mount

What to do0 / 3 checked

Each lower control arm mounts to the chassis at two points: a forward bushing and a rear bushing. Use the LOWER set of holes on the chassis for both. Push the supplied bolts in from the inside of the frame outward through each bushing eye.
The rear bushing mount on the chassis is wider than the front because it is sized to accept stock Mustang arms. If you are running the Factory Five aluminum , slide the supplied large washers onto the bolts at that rear mount to take up the extra space — otherwise the bolt will pinch the bushing.
Hold the arm parallel to the ground (that is the loaded ride-height position) and torque the bolts to 135-162 (100-110 ). Repeat on the other side.

Spec sheet

LCA to frame bolts
Hold the arm parallel to the ground when final-torquing — torquing at a different angle pre-loads the bushing.
100-110 lb-ft (135-162 Nm)