This Allstar Performance bump stop spring cup is a single-spring cup machined from aluminum with a black anodized finish. It measures 2 in OD, 0.4 in tall, with a 1.28 in recess sized to hold a 1 in bump spring, and a 0.5 in thru hole for the shock shaft.
Spec Sheet: Allstar Spec Sheet
Compatibility
This is universal shock-mount hardware, not tied to a specific vehicle make or model. It is compatible with shock shafts matching the 0.5 in thru hole diameter, and accepts a 1 in bump spring in the 1.28 in recess.
FAQ
What shock shaft diameter does this bump stop cup fit?
It has a 0.5 in thru hole, so it fits shock shafts matching that diameter.
What size bump spring does this cup hold?
The 1.28 in recess is sized for a 1 in bump spring.
What are the outer dimensions of this cup?
It measures 2 in OD and 0.4 in tall.
Is this cup vehicle specific?
No. It is universal shock-mount hardware and works with any shock shaft matching the 0.5 in thru hole diameter, regardless of vehicle make or model.
What material and finish is this cup made from?
It is machined aluminum with a black anodized finish for corrosion resistance.

