SPE Motorsport S550 and S650 Solid Axle Conversion
SPE Motorsport S550 and S650 Solid Axle Conversion is backordered and will ship as soon as it is back in stock.
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Confirm vehicle fitment
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Shipping expectations
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What’s included
What’s included
The product description and selected variant determine what is included. Items shown in lifestyle or installation photos are not included unless they are specifically listed in the description.
SPE Motorsport S550 and S650 Solid Axle Conversion
SPE Motorsport S550 and S650 Solid Axle Conversion is backordered and will ship as soon as it is back in stock.
Buy with confidence
Verify fitment, selected options, availability and included components before checkout. Secure payment options and order confirmation are provided at checkout.
Description
Description
SPE Motorsport S550/S650 Solid Axle Conversion Cradle
Our S550/S650 solid axle conversion cradle lets you swap your IRS Mustang over to a proven Foxbody-style straight axle setup using all Foxbody style rear ends and control arms. Including 8.8 and 9" variants. It bolts into the factory IRS mounting locations and gives you a true triangulated 4-link layout that meets factory suspension class rules.
The cradle is built from chromoly tubing and TIG-welded in-house here in the USA. It’s designed for serious power applications and built to take abuse. The only chassis tie-in is 4 bars from the cradle to the main hoop of your roll cage (this is highly recommended for high hp applications). The rest of the structure is self-supporting once installed. Unlike other setups on the market.
This conversion does require rear floor pan modification. The rear floor section must be cut out to clear the cradle and the Foxbody straight axle setup. No additional modification to the chasis is needed beyond that.
Features
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Direct bolt-in to IRS mounting points
Uses all factory S550/S650 IRS mounts for clean, consistent installation. -
Foxbody-compatible
Works with all Foxbody rear ends, and Foxbody control arms. True triangulated 4-link geometry. -
Class-legal design
Meets factory suspension class rules by utilizing a factory-style straight axle and 4-link layout. -
Chromoly construction
Strong, lightweight, and designed for high-power builds. - Multi hole control arm mounting for bar angle adjustments. All mounts have doublers. LCA = 5 hole UCA = 10 hole
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TIG-welded in the USA
All fabrication is done in-house for the highest quality and consistency. -
Minimal chassis tie-in
Only 4 bars are needed to the main hoop for maximum support. The cradle handles the rest. -
Rear floor modification required
The rear floor pan section must be removed for clearance.
This is the cleanest way to run a solid axle in an S550 or S650 Mustang while keeping geometry proven, class-legal, and easy to service. No better option for drag racing!
NOTE: This is NOT a stocking item. Allow 2-3 week build time.
NOTE: Once the order is placed you will be contacted for the freight cost. A quote can also be provided prior to ordering.
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