This KellTrac S550 Mustang IRS Subframe "Posi-Loc" System for the S550 Mustang positively locates the rear IRS Subframe within the chassis. By filling the voids within the factory bushings and putting positive pressure on the factory bushing stops, this kit eliminates the deflection found within the stock assembly that leads to poor performance in all scenarios. Whether you are a spiritedly street cruising, drag racing, road racing or auto-crossing this KellTrac Posi-Loc system will significantly improve the performance and feel of your S550 Mustang.

-CNC Machined Lightweight Design

-6061-T6 Billet Aluminum, Anodized Black

-Precision fitment for maximized performance

-Zero NoiseVibrationHarshness Increase

-Industry First Unique rear lower design, replaces factory bushing stop plate

-Reduces Wheel-Hop

-Centers Subframe to Chassis

-No centering sleeves needed!

-Improves Handling, Traction and Feel

-Helps prevent bushing and driveline part damage

-Can assist in reducing driveline vibrations

-Reduces pinion angle change under heavy WOT loads