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  • PSC steering system components, including a steering gear, PSC 715 hydraulic oil, pump, hoses and fittings on a white background. The kit is for Dodge Ram.
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BIG BORE XD® Cylinder Assist® Kit – Dodge RAM 2500 / 3500 / 4000 (2003–2008) – Weld-On

BIG BORE XD® Cylinder Assist® Kit – Dodge RAM 2500 / 3500 / 4000 (2003–2008) – Weld-On

$1,920.00
$1,920.00
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Part Number: SK853

This BIG BORE XD Cylinder Assist Kit is built for Dodge RAM trucks that need serious steering muscle. When you’re running big tires and working that front end hard, factory steering just doesn’t cut it. This kit adds hydraulic assist to take the load off your steering gear, giving you smooth, confident control whether you’re crawling rocks or hauling heavy. Weld-on brackets keep everything locked down tight, so you can push your truck without worrying about steering failure.
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About:About:

Why you’ll love it

  • Handles oversized tires like a champ
  • Reduces steering effort and wear on your steering gear
  • Built tough for trucks that work and play hard

Tech InfoTech Info

Heads‑up for installers

This kit requires welding for proper installation. Make sure you’ve got the right tools and skills or a trusted shop to handle the job.

Before you order, we recommend double-checking your axle’s steering travel measurement to make sure you get the right kit. If you’re not sure how to measure, there’s a quick ‘How to Measure’ video at the bottom of this product page to walk you through it.

Fitment

  • Dodge RAM 2500 / 3500 / 4000
  • Model years: 2003–2008

Use it with

  • PSC BIG BORE XD Steering Gear

Ideal for

  • Trucks running 35”+ tires
  • Heavy-duty off-road builds
  • Work trucks that demand reliable steering

Specs

  • Cylinder Assist hydraulic ram
  • Weld-on mounting brackets
  • High-pressure hoses and fittings

What’s included

  • BIG BORE XD Cylinder Assist Steering Gear – Dodge RAM 2500 / 3500 (2003–2008) (SG853R)
  • Cylinder Assist Axle Kit – Dodge 2500 / 3500 (2003–2013) – 4WD (CAK855), which includes:
    -PSC 715 Power Steering Fluid – 4-Quart Pack (FL-SWE715-4PAK)
    -Cylinder Assist Hose Kit – (3x 90°, 1x 45°, 6 ft Hose) (HK2015)
    -Assist Cylinder – Single-Ended – 1.5" x 8.0" (SC2200)
    -Cylinder Assist Rod End Kit – 5/8" Female, 5/8" Male – 5/8" Ball – With Hardware (SCRK1)

SupportSupport

Installation Video

Installation Video Thumbnail
California Prop 65 Warning

California Prop 65 Warning

This product can expose you to chemicals including lead and di (2-ethylhexyl) phthalate, which are known to the State of California to cause cancer, birth defects or other reproductive harm.

For more information, go to www.P65Warnings.ca.gov