Extreme Pro Series 4-Link Kit with Billet Adjustable Shock Mounts

Quarter-Max's Extreme Pro Series 4-Link Kit offers more strength and adjustability than our standard Pro Series kit.

This 4-link kit features our billet adjustable shock mounts, which offer a wide range of adjustability over a fixed shock mount location. For customers that are not exactly sure of the final ride height or stance they want, or what shock length they need to order, having this adjustable shock mount allows for a wide range of adjustment after the build is completed, allowing the customer to keep their options open.

The addition of the billet adjustable shock mounts to a 4-link kit is a great addition to any car, from the street to the strip, especially for drag racers looking to potentially switch back and forth from large slicks to smaller drag radial tires. For customers looking to participate in Drag Week, adjustable shock mounts are just the ticket to be able to raise the car for highway use and lower it down when you get to the race track.

Select your desired billet adjustable shock mount style:
• 3/4 in. wide double shear
• 3/4 in. wide threaded

The threaded shock mounts feature 3-1/2 in. of height adjustment in 1/2 in. increments between the billet shock mount and the brackets. A 1/2 in.-20 grade 8 bolt is used to mount the coil-over shock to the billet shock mount.

The double shear shock mounts feature 4-1/2 in. of height adjustment in 1/2 in. increments between the billet shock mount and the brackets. A 3/8 in. NAS bolt is used to mount the coil-over shock to the billet shock mount.

For extra strength, this kit features our high quality 1-1/2 in.x.095 in. 4130 Pro Series 4-link bars.

The Quarter-Max Extreme Pro Series line of chassis and housing brackets feature a hole spacing of .625 in. to allow for a finer range of adjustment. Our brackets are manufactured in-house to high quality specifications with precise hole locations and smooth profiles.

Chassis brackets are available in 1/4 in. thick 4130. We offer 2 different styles of weld-on chassis brackets, which feature notches for 1-5/8 in. crossmembers. The center of the top of the crossmember to the center of the bottom crossmember is either:
• 13 in. notch spread
• 15 in. notch spread

With 16 holes of adjustment, these chassis brackets provide you with more adjustability than any fixed chassis bracket on the market.

Housing brackets are available in 1/4 in. 4130 with a 3-1/2 in. axle tube hole size. With 19 holes of adjustment, these housing brackets provide you with more adjustability than any bracket on the market.

1/8 in. thick 4130 upper and lower doubler plates for the chassis and housing brackets are included to increase the thickness around the holes to 3/8 in. for added strength and longevity.

This kit also features NAS bolts with MilSpec nuts. Close tolerance holes for the 1/2 in. NAS bolts provide a tight fitment and considerably less bolt movement than competitors systems.

Kit includes:
• (4) Extreme Pro Series chassis 4-link brackets with upper and lower doubler plates
• (4) Extreme Pro Series housing 4-link brackets with upper and lower doubler plates
• (4) 1-1/2 in.x.095 in. 4130 Pro Series 4-link bars
• (4) 3/4 in.-16 LH tube adapters
• (4) 3/4 in.-16 RH tube adapters
• (1) 1/2 in. bore x 3/4 in.-16 thread 4130 rod end kit
• (2) 3/4 in. wide billet adjustable threaded shock mounts with 1/2 in.-20 grade 8 shock bolts or 3/4 in. wide billet adjustable double shear shock mounts with 3/8 in. NAS shock bolts.
• 1/2 in. NAS 4-link bolt hardware

During installation while mocking up and welding, we recommend the use of grade 8 bolts with our 4-link jigs to hold the brackets together in the correct position. After all the welding is complete, we recommend reaming the holes using our 7 piece chucking reamer kit #RJ-219850. Do not use a drill bit!