Extreme Adjustability From Quarter-Max’ Newest 4-Link System

Not only are Quarter-Max’ RJ Extreme 4-Link systems designed to withstand the power levels of today’s top racing classes, the wide array of adjustments gives the suspension tuner multiple bar angle options. By using billet steel plates with an intricately spaced holes that allow for 1/8-inch increments, these systems offer more adjustment than any other 4-link on the market. 

Official Release:

Our adjustable 4-link system has a full range of adjustability and is very simple to use. The weld-on chassis bracket utilizes a unique bolt-on system that allows both top and bottom plates to move up and down in increments of 1/8″ giving an infinite amount of adjustability. The bolt on upper and lower brackets are CNC machined from billet 4140 and are heat treated for added strength and to stop hole elongation. They are also zinc plated. The weld on chassis brackets are CNC machined from billet 4140 with all holes drilled and reamed for an exact fit. The system uses a unique keyway system for extra strength. The bolt on plates have Qty-6 1/2″ holes that have a .625″ spacing. Our kit offers more adjustability than any other kit on the market. The kit comes complete with NAS hardware and ARP 12 point nuts. Sold in pairs (welding required)

There are 3 styles of weld on billet chassis brackets available. We have our standard weld on bracket, our 2″ taller weld on bracket that has the top notch in the same location just 2″ higher. We also offer a weld on bracket that is 2″ taller than our standard bracket but it does not have a notch on top to it can be fitted to different styles of chassis. (See illustrations) All weld on brackets will accept our bolt on brackets.

When mocking up and welding together brackets you should use grade 8 bolts. After all the welding is done you should ream the holes to correct size. DO NOT USE A DRILL BIT! We recommend using NAS bolts.

 Features:

  • More adjustments than other designs
  • Billet steel  construction
  • High-grade hardware

About the author

Jake Amatisto

Jake Amatisto has been a writer and photographer in the automotive industry since 2001. A drag racer at heart, Jake is an enthusiastic gear head with a never-ending thirst for knowledge about anything with an engine. Whether it's a classic hot rod, high-powered drag car, or bad-ass truck, Jake is up for it.
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