M12 Press-In Upper Control Arm Flex Joint
Replace worn-out upper control arm bushings or upgrade your suspension with Iron Rock Off Road's rebuildable press-in flex joint. Designed for Jeep builders who need increased suspension articulation, this joint provides up to 30° of total misalignment while maintaining a compact, OEM-fit 2" mounting width.
Whether you're refreshing a factory component, upgrading an Iron Rock Off Road control arm, or fabricating a custom suspension link, this versatile joint provides a durable solution for applications requiring additional articulation.
Each joint is precision machined and supplied unassembled.
Product Features & Benefits
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Press-In Replacement: Designed to replace compatible axle-side upper control arm bushings. Also suitable for upper control arm bushings in compatible factory, Iron Rock Off Road, and other aftermarket control arms.
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2" Mounting Width: Matches the mounting width of OE Jeep upper control arm bushings for compatibility with OE and most aftermarket control arms.
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M12 Through-Bolt: Designed for applications using a 12mm mounting bolt.
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30° Total Misalignment: Provides substantial angular movement to accommodate suspension articulation and help reduce joint binding.
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UHMW Races: Ultra-high-molecular-weight polyethylene (UHMW) offers excellent impact and abrasion resistance, low friction, and self-lubricating performance.
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Bolt-Together Design: No snap rings or threaded jam nuts are required to retain the joint's internal components.
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Simple Assembly & Maintenance: No spanner wrench is required to assemble or maintain the joint. Simply use the provided allen key to assemble the joint.
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Fully Rebuildable: Designed to be disassembled and rebuilt, allowing worn internal components to be serviced instead of replacing the entire joint.
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Builder-Friendly Design: An alternate weld-on variant is a versatile solution for custom control arm fabrication and suspension setups requiring greater articulation than conventional rubber bushings.
Fitment & Applications
The M12 version is intended for compatible front axle upper control arm mounting locations using a 12mm through-bolt.
Typical applications include:
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Jeep Gladiator JT
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Jeep Wrangler JL
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Jeep Wrangler JK
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Compatible Dana 30 and Dana 44 front axles
Important: Confirm your actual mounting bolt diameter before ordering. Some axle and suspension configurations may use different hardware.
For XJ, ZJ, TJ, & WJ Dana 30 and Dana 44 applications using a 10mm upper control arm bolt, see our M10 Upper Control Arm Flex Joint.
Related Products
Note: The joint is supplied unassembled. Verify the fitment, mounting hardware, and required press-in dimensions for your application before installation.