After years of testing, Watson Racing brings you its much-anticipated, S550 Mustang HEAVY DUTY & LIGHT WEIGHT,9-inch Independent Rear Suspension System. Designed for the serious Drag racer that doesn’t want to cut up the back of their Mustang S550 to install a solid rear axle.
Proven and validated in Watson Racing's 2015 S550 Mustang street/strip Drag Race car. As a result, Watson's S550 was the First fastest street-legal S550 on the planet. Running consistent 8.50’s with over 1000-HP. Watson's S550 Mustang is seen here on the Watson Racing YouTube Page. This racecar hasn’t just made a few passes - it competes regularly in numerous NMRA and NMCA True Street Drag race competitions around the country!
Features The features and benefits of our Mustang S550 IRS Drag Race System are numerous!
Equal-length double A-arm design with adjustable Toe and Camber. Geometry designed specifically for drag racing means launching HARD and STRAIGHT.
LIGHTWEIGHT - 100-percent Tubular Chromoly construction is strong and saves weight. 110 pounds weight savings over stock!
Subframe bolts in using all factory mounting points, with very little modification required for installation.
Features Wilwood inboard disk brakes, reducing unsprung weight while allowing clearance to run an off-the-shelf 15-inch drag race wheel(15x10 4.75 bolt circle).
Fabricated 9-inch Ford differential housing offers endless gear ratio options and makes center section changes a breeze (9-inch gear set/differential not included).
We proudly partnered with G-Force Engineering on the custom 35-spline axles, included with the Watson IRS kit.
Billet aluminum spindles provide incredible strength and light weight.
Highest quality components throughout. Aurora Bearing rod ends, HOWE Precision Ball Joints (re-build-able), Wilwood brakes, and G-Force axles, combined with double-shear design and high-strength Chromoly mean this system was meant to last.