Rear Adjustable Spring Perch Kit for Ford Mustang S550 (2015-2023) Spring Option:Hyperco 1200 lb/in (2.5" ID) Rebuild coilovers to original specifications

Rebuild coilovers to original specifications

This is invaluable for tuning your suspension quickly at the track on race day

Specifications - 25mm wide x 11mm tall  **Please confirm that these larger knobs have adequate clearance and won't come into contact with strut bars and other obstructions

This change will result in a far more predictable engagement during high-performance driving

Progressive engagement limits rapid changes in spring rate which is caused by high-rate bump springs or bump rubbers

Rear Adjustable Spring Perch Kit for Ford Mustang S550 (2015-2023) Spring Option:Hyperco 1200 lb/in (2.5" ID) Rebuild coilovers to original specificationsThis Rear Adjustable Spring Perch Kit allows the use of many more spring rate options in the rear. This kit will allow you to fine tune the ride height of your S550 Mustang and adjust your corner balance to help with handling. Fortune Auto Springs are not compatible with this kit. 6" Swift Springs with 65mm ID and 6" HyperCo springs with 2. 5" ID are compatible.