Jeep Wrangler Unlimited Leaf Spring Shackle - Fishbone Offroad - 4 Degree Leaf Spring Shim - Black - `07-`18. A purpose-built 4-degree leaf spring shim engineered for 2007–2018 Jeep Wrangler Unlimited (JKU) 4-door models to help correct pinion and driveline angles after lift or suspension changes.

This Fishbone Offroad shim is designed to mount at factory spring locations and installs without drilling, making it a practical upgrade for enthusiasts who want reliable geometry correction without heavy modifications. Finished in a two-stage black textured powder coat, the pair resists corrosion and road wear. It’s intended for use with 2.5" springs and is supplied as a pair for both sides of the axle, providing consistent alignment and improved U-joint life when paired with appropriate suspension setups.

Features

• Fits 2007–2018 Jeep Wrangler Unlimited (JKU) 4-door models
• 4-degree shim for driveline/pinion angle correction
• No-drill installation; mounts on factory locations
• Two-stage black textured powder coat finish
• Sold as a pair; compatible with 2.5" springs

If you have questions about fitment, installation, or compatibility with your lift and spring setup, call us directly — we're happy to help. We offer installation and customization services at both of our locations in Austin, Texas and the Los Angeles, California area. Call: 512-982-9393 (TX) or 562-981-6800 (CA). If you’re thinking about purchasing multiple items, contact us for shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov