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Home | 15-17 Mustang | Suspension | IRS Components | 2015-19 Mustang S550 Watson Racing 9-inch Lightweight IRS

2015-19 Mustang S550 Watson Racing 9-inch Lightweight IRS

Item Number:WR-15-REARSUBFRM
Availability:Usually ships the next business day
Market Price:$14,962.50Our Price:$13,125.00
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  • Description
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S550 Mustang Drag Race Independent Rear Suspension (IRS)


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 doesnít 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 8.50ís with over 1000-HP. Watson's S550 Mustang is seen here on the Watson Racing YouTube Page. This racecar hasnít just made a few passes - it competes regularly in numerous NMRA and NMCA True Street Drag race competitions around the country!

Features
  • 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 points using all factory mounting hardware, with very little modification required for installation.
  • Features Wilwood inboard disc brakes, (brake lines not included) reducing unsprung weight while allowing clearance to run an off-the-shelf 15x10 drag race wheel (4.75 bolt circle).
  • 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 reduced weight.
  • Highest quality components throughout. Aurora Bearing rod ends, HOWE Precision ball voints (re-buildable), Wilwood brakes, and G-Force axles, combined with double-shear design and high-strength Chromoly mean this system was meant to last.
  • Fabricated 9-inch Ford differential housing offers endless gear ratio options and makes center section changes a breeze. 9-inch gear set/differential and center section- not included.
** Unfortunately, this part does not qualify for free shipping. Flat rate shipping cost is $175.00 in the continental U.S.

Ordered the cold air and tuner combo. Best tune I have had. Really woke up my 5.0

- C. Faulkner

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