Mark Williams New XK & XJ Series Jaguar Upgrade Means More Strength and Safety!


Mark Williams New XK & XJ Series Jaguar Upgrade Means More Strength and Safety!

If you are running a IRS in your hot rod and that IRS is a Jag style unit that employs the basic Jaguar design, there are some parts of that program that aren’t all that great. Mark Williams has you Jag XK and XJ series IRS handled! We’re talking a revised design that makes the unit safer, more robust and it employs the best components in the business.

With a wimpy 10-spline hub, the hub and yoke shaft are very prone to failure when they see any horsepower. This upgrade moves to modern 31-spline design which increases strength exponentially, uses 300M material, a forged hub design which is also way stronger, ARP wheel studs, billet removable yoke-shaft caps, and more.

Don’t hope and pray your stuff holds together. Take advantage of this new parts from Mark Williams Enterprises!

XK & XJ Series Jaguar Upgrade


JAG-1000 Rear Axle Hub-Yoke Assembly
  • Eliminates Jag XK & XJ 10-spline hub and yoke-shaft failure
  • Increased size to modern 31-spline yoke shaft
  • Aircraft quality 300M yoke spline Shaft
  • Forged alloy hub with removable wheel studs
  • Wheel studs are ARP quality with quick-start feature
  • Yoke shaft features removable billet alloy caps
  • Complete bolt-in kit with all required shims and spacers
  • Utilizes OEM bearings and seals
Part Number JAG-1000

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