S550 Mustang IRS Subframe "Posi-Loc" System, Studded

This KellTrac IRS Subframe Posi-Loc system for the S550 Mustang is designed to positively locate the rear IRS subframe in the chassis.

KellTrac says the kit fills the voids in the factory bushings and puts positive pressure on the bushing stops to reduce the deflection in the stock assembly that can hurt performance.

KellTrac describes the kit as beneficial for street driving, drag racing, road racing, and autocross by improving feel and overall performance.

This studded version also replaces the OE subframe bolts with studs, nuts, and washers so the subframe height and angle can be adjusted without sacrificing thread engagement.

• CNC-machined lightweight design
• 6061-T6 billet aluminum with black anodized finish
• Precision fitment
• Unique lower design that replaces the factory bushing stop plate
• Helps reduce wheel hop
• Centers the subframe to the chassis
• Improves handling, traction, and feel
• Can help reduce driveline vibration and pinion-angle change under heavy load
• Includes zinc-coated Grade 10.9 studs, class 10 nuts, and washers
• Includes M14x2.0 hand tap and anti-seize
• Helps prevent cross-threading and thread damage
• Makes frequent subframe drops easier for cars that see regular service or racing