$134.00
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RockJock’s greasable Boomerang rear shackles for YJ Wrangler vehicles directly replace the stock shackles with our new, heavy duty units. Our shackles feature laser cut, 1/4 in. thick steel side plates that are a boomerang shape, to allow the spring eye to travel much further around the back of the vehicle for increased articulationl Additional features include Energy Suspension fluted urethane bushings, grade 8 greasable bolts that feature zerk fittings on their heads for greasing of the bushings, and center bolt-in sleeves for added rigidity. Shackles are 4 3/4 in. tall from bolt center to bolt center. Finished in corrosion proof gold zinc plating and sold in pairs.
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Color Options | Charcoal, Orange, Yellow, Blue, Green, Light Green, Red, Purple, Black, White |
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Our product lines are designed to offer the absolute most value for your budget. Not every build is the same and we understand that. Our series differ mostly in the components used in the construction of the parts. Our Cruise and Town Series utilizes our high grade flex poly bushings at both ends of the arm, this has proven to be a smooth riding easy to maintain and replace bushing that we absolutely love. Our Camp and Trail Series utilizes 5/16″ wall DOM tubing and incorporates a flexible Johnny Joint at the adjusting end, this series has been our most popular series for all around use, great for daily drivers that want to tear up the trails as well. Our Crawl, Tow, and Track Series utilizes the same 5/16″ wall DOM tubing, but features Johnny Joints at both ends. This series gives you the absolute most out of your suspension. This is great for heavy towing/hauling and extreme off-roading. Also, if the component is straight in these series we will machine these left and right hand threaded for easy adjustment on the vehicle!
We are constantly expanding our product lines to include complete kits, if you don’t see something on the site for your vehicle, reach out to our sales team and we can put something together for you.
Our two main sizes of jam nuts require an1-1/2″ wrench or an 1-5/8″ wrench. Generally speaking the 1-5/8″ jam nuts are used on our lower control arms and the 1-1/2″ jam nuts on our upper control arms and track bars. There are some exceptions, but we do offer a crow’s foot that has both sizes.
Any non-synthetic moly based grease is safe on our products, avoid lithium greases and anything red as this can prematurely deteriorate the internal components of the Johnny Joints and bushings used on our parts.
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Core4x4 has an unwavering dedication to crafting top-tier control arms and aftermarket parts that can conquer any trail or obstacle, while still maintaining exceptional on-road performance.
As the founder of Core 4×4, I stand behind our unwavering commitment to delivering top-tier, American-made products that don’t break the bank. We take immense pride in our craftsmanship, sourcing materials domestically to ensure the highest quality possible. Our team goes the extra mile to rigorously test and refine every product, ensuring it not only meets but exceeds industry standards. When you choose us, you’re choosing durability, reliability, and affordability. That’s not just a business model— it’s a promise, from our family to yours.
Sincerely,
Spence Schramm
Founder, Core 4×4