An OMP seat bracket spacer with double height adjustment. Part number HC857.
This is the part you need when the seat is in the car and the height is not right. A spacer sits between the sub-frame and the seat mounting and raises it, and the double adjustment means two positions rather than one, so you can dial it in rather than accepting a single fixed step.
When you need one
Most often it is the opposite problem to the one people expect. Everyone fits a bucket seat to get lower, and then discovers they cannot see over the bonnet, or that the standard seatbelt now runs across their neck, or that a short driver cannot reach the pedals with the seat at its lowest. A spacer puts back a controlled amount of height without undoing the installation.
It is also used to correct seat angle. Spacing one end and not the other changes the rake of the cushion, which is how you fix a seat that tips you forward.
Specification
Steel, sold singly and handed, so choose RHD driver or RHD passenger and order twice if you are doing both sides.
Before you order
Measure what you actually need first. Tell us the seat, the frame and how much height you are looking for, and we will confirm this is the right part rather than have you buy twice.
Reset your harness anchor points after any height change. Seat height decides where the shoulder straps are allowed to run.




