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Suspension and Components› Rear Suspension Components

Steeda

IRS Subframe Alignment Kit

$89.95 $79.95 Save $10.00

SKU: 555 4438

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Special Order
Ships in 4–6 weeks
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$100 Minimum Order
30 Days Return
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Overview

The Steeda Mustang IRS Subframe Alignment Kit is a CNC-machined Delrin component designed to address factory subframe misalignment in S550/S650 Mustangs. The kit fills the gap between the subframe mounting holes and bolts, ensuring consistent subframe positioning. It is easy to install, requires no permanent modifications or additional hardware, and does not increase NVH.
Show original supplier description
The Steeda Mustang IRS Subframe Alignment Kit is engineered to correct potential factory misalignment in the rear subframe of 2015 and newer Mustangs. Factory mounting holes can allow for up to a 1/2" misalignment, impacting vehicle dynamics. This kit, crafted from CNC-machined Delrin, provides a precise fit, preventing corrosion by avoiding dissimilar metal contact and keeping weight down. This ensures the subframe is consistently bolted to the same location every time it is lowered, potentially eliminating the need for frequent alignments. The installation process is straightforward, requiring no permanent modifications or additional hardware, and the kit guarantees no increase in Noise, Vibration, and Harshness (NVH). This alignment kit is compatible with 2015+ Mustang GT, GT350, EcoBoost, and V6 models, as well as the S550 GT500. A note for customers running the CB005 Kit: the Steeda Mustang Alignment Kit for the S550 Rear Subframe for BMR CB005 Kit (555-4447) must be purchased separately. An initial alignment is recommended upon installation to account for any pre-existing factory misalignment and to properly square the chassis. Steeda offers a limited lifetime warranty on this IRS Subframe Alignment Kit.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

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Specifications

BrandSteeda
Part Number555 4438
CategorySuspension and Components
5,000+ Trusted brands
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Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

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