Pro Series 4-Link Kit
Our Pro Series 4-Link Kit was designed to hold up to high horsepower and has been race proven on RJ Race Cars for years. The chassis brackets feature qty (8) 1/2” top holes and qty (6) 1/2” bottom holes for a wide range of 4-link tuning adjustability. The brackets also feature a hole spacing of .800" instead of the normal 1" spacing to allow for a closer range of adjustment. Manufactured in house on our water jet machine.
We offer 3 different styles of weld-on chassis brackets. They are available in different heights/configurations to fit any chassis crossmember setup (the center of the top crossmember to the center of the bottom crossmember):
• Standard 4130 - 13" Notch Spread
• Blank 4130 - No Notches (Universal)
• Blank Mild Steel - No Notches (Universal)
Select your desired axle tube hole size on the housing brackets:
• (4) Pro Series 1/4" thick chassis 4-link brackets
• (4) Pro Series 1/4" thick 4130 housing 4-link brackets
• (4) 1-1/4" .095 4130 4-link bars
• (8) 3/4"-16 LH & RH tube adapters
• (1) 1/2" x 3/4"-16 4130 rod end kit
• 1/2" NAS 4-link bolt hardware
This kit features NAS bolts with MilSpec nuts. Close tolerance holes for the 1/2" NAS bolts provide considerably less bolt movement than competitors systems. Features .800" hole spacing instead of the normal 1" spacing to allow for a closer range of adjustment.
We also offer 1/8” thick 4130 doubler plates for the top and bottom holes that weld to the 4-link bracket to increase the thickness around the holes to 3/8” for extra strength and longevity. Doubler plates and longer NAS bolts are sold separately.
During installation while mocking up and welding we recommend the use of grade 8 bolts with our 4-link jigs (available separately) to hold the brackets together in the correct position. After all the welding is complete we recommend reaming the holes and using our NAS 4-link bolt kit during final assembly for even less bolt movement. Do not use a drill bit! We recommend using our 7 piece chucking reamer kit.
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