Hey, sorry about that! If you are ever missing anything from your order please call us ASAP. If you are missing instructions we can always email or fax them to you. If it's over the weekend you can usually find them in the e-store on our website.
Based on the information you've given above, I believe you have the splined end anti-roll bar, part number 5821-F10. Download the PDF by clicking
HERE or by clicking on the 'Documents' tab
HERE.
Let me know if you need anything else!