- 4-piece IRS Bracing System, most thorough IRS Bracing System Available
- Reduces IRS Movement and IRS Assembly Deflection
- Compatible with BMR and other IRS Modifications / Mounting Solutions
- Zero decrease in ground clearance
- Extremely easy bolt-on installation
- Works better than any other bracing solution when used alone as a single product
- Reinforces critical areas of the IRS Subframe by reducing leverage
- High-Quality hardware for installation included
- Made of U.S. Materials by U.S workers!
- Designed, Tested, Manufactured and Shipped from BMR's facilities in the U.S.A! (Seffner, FL and Lakeland, FL)
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Avoid headaches and replace those pesky OE subframe mounting bolts with this kelltrac IRS stud kit. This kit includes everything you need to stud your S550's rear IRS subframe to the chassis. -Zinc Coated Grade 10.9 studs, class 10 nuts and washers -Comes with M14x2.0 Hand Tap and Anti-Seize for proper installation -Allows adjusting of subframe heights and angles without compromising thread engagement -Prevents cross threading which is VERY common. Also prevents damaging threads which is common on the front driver side mount -Allows the ability to drop the subframe VERY low and still support from the studs. This is convenient for those who need to work on the IRS frequently (racers)Learn More

Steeda Subframe Alignment And Support Kit - 555-4450

Steeda has come out with a kit that all S550 Mustang customers have been waiting for.. The Steeda S550 Subframe Alignment and Bushing Support System!

We combined our ever so popular 555 4438 and 555 4437 kits into a money savings combo kit where you the customer benefits! The S550's subframe mounting holes are very large compared to the subframe mounting bolts. Since there is a large difference in bolt and hole size, the subframe can be mis-aligned from the factory up to 1/2" left to right. The Steeda S550 Mustang IRS Subframe Alignment Kit is made from CNC-machined Delrin to avoid putting two dissimilar metals next to each other, preventing corrosion. Delrin is also less weight than aluminum or steel inserts and therefore keeping performance in mind. The Delrin sleeves slide into the subframe mounting holes, and fill the extra space left between the subframe mount and bolt from the factory therefore eliminating any movement. Our Steeda S550 Mustang IRS Subframe Alignment Kit guarantees that the subframe will be bolted to the same location every time it is lowered. Eliminating the need for unnecessary subframe alignments.

These Steeda S550 Mustang IRS Subframe Bushing Support System for your 2015+ Mustang GT, EcoBoost, and V6 gives the rear end a much more solid feel with no increase in NVH at all. The Steeda IRS Subframe bushings eliminate rear subframe movement notorious in the S550 Mustang GT, EcoBoost, and V6. A stiffened subframe allows the car to increase traction to the rear wheels and is the first step towards eliminating wheel hop. The Steeda S550 Mustang IRS Subframe Bushing Support System for your 2015+ Mustang GT, EcoBoost, and V6 are easy to install, with basic hand tools. The Steeda IRS bushing kit also does not require any permanent modifications to the car.

PATENT NO.: US D784,881 S

Product Benefits

• Our IRS Subframe Bushing Support system fills in all factory voids in order to eliminate movement of the IRS subframe
• Utilizes all 4 factory mounting locations, which completely restricts shifting or rotation (Competitors only support 2 locations)
• Practically no added weight to the vehicle
• Uses precision machined Delrin sleeves which adds no NVH and limits vibration to the vehicle
• CNC Machined parts for a precision fit unlike welded and stamped parts with slotted holes
• Aligns AND holds the subframe in place, in all 4 mounting locations
• Easy installation, can be done in under 2 hours
• More cost effective than others on the market to control wheel hop

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- 4-piece IRS Bracing System, most thorough IRS Bracing System Available
- Reduces IRS Movement and IRS Assembly Deflection
- Compatible with BMR and other IRS Modifications / Mounting Solutions
- Zero decrease in ground clearance
- Extremely easy bolt-on installation
- Works better than any other bracing solution when used alone as a single product
- Reinforces critical areas of the IRS Subframe by reducing leverage
- High-Quality hardware for installation included
- Made of U.S. Materials by U.S workers!
- Designed, Tested, Manufactured and Shipped from BMR's facilities in the U.S.A! (Seffner, FL and Lakeland, FL)
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UPR Billet IRS Subframe Braces for 2015-2019 Mustangs. CNC Billet IRS Subframe Braces work with or without an IRS lockout kit and stabilizes the IRS subframe to the body of the car. This replaces the flimsy stamped steel factory brace that is known to twist.

Product Features
* 2pc Kit
* Machined Finish
* Improves Handling
* Reduces Wheel Hop
* Improves 60ft Times
* 15 Minute Installation
* CNC Machined from 6061 Billet Aluminum

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This Level 1 KellTrac S550 Mustang IRS Bushing Upgrade Kit for the S550 Mustang positively locates the rear IRS Subframe AND the rear lower control arms within the chassis. By filling the voids within the factory bushings on the Subframe Mounts and putting positive pressure on the factory bushing stops, the PosiLoc kit eliminates the deflection found within the stock assembly that leads to poor performance in all scenarios. By completely removing the sloppy rubber in the factory front Lower Control Arm bushing, the Spherical Bearing kit positively and precisely locate the rear axle knuckle assemblies within the chassis. These Lower Control Arm Bearings are made from only the best materials. The factory rubber bushings, or even aftermarket polyurethane bushings deflect under heavy loads - these bearings eliminate that deflection that leads to poor performance in all scenarios. With our Level 1 kit we provide front centering sleeves to complete the squareness of the IRS Subframe when mounting to the vehicle. Whether you are a spiritedly street cruising, drag racing, road racing or auto-crossing this Level 1 KellTrac Bushing Upgrade Kit will significantly improve the performance and feel of your S550 Mustang.

FEATURES: KellTrac Posi-Loc
-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

FEATURES: Rear Control Arm Bearing Kit
-Most Proven S550 LCA Bearings
-Super Strong CNC Machined Steel Body
-Most durable coating in the industry
-6061-T6 Billet Aluminum Bearing Offset Spacers
-Proprietary to BMR 1" Spherical Bearings
-Precision fitment for maximized performance
-Minimal NoiseVibrationHarshness Increase. HIGHLY Recommended for performance applications

FEATURES: Polyurethane Centering Sleeves
-Extremely Lightweight Design
-Precision fitment for maximized performance
-Zero NoiseVibrationHarshness Increase
-Industry First Unique Polyurethane Design

BENEFITS:
-Reduces Wheel-Hop
-Centers Subframe to Chassis
-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
-Reduces unwanted suspension geometry and alignment change under heavy loads

Learn More

This Level 1 KellTrac S550 Mustang IRS Bushing Upgrade Kit for the S550 Mustang positively locates the rear IRS Subframe AND the rear lower control arms within the chassis. By filling the voids within the factory bushings on the Subframe Mounts and putting positive pressure on the factory bushing stops, the PosiLoc kit eliminates the deflection found within the stock assembly that leads to poor performance in all scenarios. By completely removing the sloppy rubber in the factory front Lower Control Arm bushing, the Spherical Bearing kit positively and precisely locate the rear axle knuckle assemblies within the chassis. These Lower Control Arm Bearings are made from only the best materials. The factory rubber bushings, or even aftermarket polyurethane bushings deflect under heavy loads - these bearings eliminate that deflection that leads to poor performance in all scenarios. With our Level 1 kit we provide front centering sleeves to complete the squareness of the IRS Subframe when mounting to the vehicle. Whether you are a spiritedly street cruising, drag racing, road racing or auto-crossing this Level 1 KellTrac Bushing Upgrade Kit will significantly improve the performance and feel of your S550 Mustang.

FEATURES: KellTrac Posi-Loc
-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

FEATURES: Rear Control Arm Bearing Kit
-Most Proven S550 LCA Bearings
-Super Strong CNC Machined Steel Body
-Most durable coating in the industry
-6061-T6 Billet Aluminum Bearing Offset Spacers
-Proprietary to BMR 1" Spherical Bearings
-Precision fitment for maximized performance
-Minimal NoiseVibrationHarshness Increase. HIGHLY Recommended for performance applications

FEATURES: Polyurethane Centering Sleeves
-Extremely Lightweight Design
-Precision fitment for maximized performance
-Zero NoiseVibrationHarshness Increase
-Industry First Unique Polyurethane Design

BENEFITS:
-Reduces Wheel-Hop
-Centers Subframe to Chassis
-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
-Reduces unwanted suspension geometry and alignment change under heavy loads

Learn More