Not sure of the answer, but I just removed the KYB's off the front of my 68 Charger, they are WAY to stiff on compression, could feel every little bump,ripple in the road, it drove great but gave a VERY rough ride in the front, I put some cheap monroe matics on & it is smooth as glass now, BUT handling was better with the KYB, but my car was built for street strip & running on the highway not corner carving