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Instruction Sheets for Part Number RSP-422339
Roush Mustang Lowering Springs for 2015-2025 MUSTANG - 422339
Part Number: RSP-422339
Roush Mustang Lowering Springs
Coil Springs, Lowered, 1.00 in. Front, .75 in. Rear, Progressive Rate, Without MagneRide, Red, Ford, Set of 4
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Estimated Ship Date from Ohio: Monday 10/19/2026 Would you rather pick it up?
Overview
Brand:
Manufacturer's Part Number:
422339
Part Type:
Product Line:
Summit Racing Part Number:
RSP-422339
Ride Height:
Lowered
Spring Positioning:
Front and Rear
Front Spring Lowered Amount Range (in.):
1.00 in.
Rear Spring Lowered Amount Range (in.):
0.75 in.
Progressive Rate Spring:
Yes
Spring Finish:
Red
Bushings Included:
No
Quantity:
Sold as a set of 4.
Notes:
Designed for use with applications without factory Ford MagneRide suspension systems only and designed to be paired with Roush tuned calibration RSP-422231.
Roush Mustang Lowering Springs
Looking for a new aggressive stance to complement your Mustang, while still obtaining a quality ride? Look no further. Roush Performance offers lowering spring kits for all 2005-14 Mustang owners, both GT and V6 applications. These springs will be a direct swap-out for your factory springs, and install in about 3 hours. Included will also be a detailed installation guide so you can get your Mustang back on the road in no time!
When added to a 2005-14 Mustang GT (or V6 model), these springs provide a .50 in. drop over the stock ride height. On 2005-10 Mustangs, when used with the Roush front struts and rear shocks, vehicle ride height will drop to roughly 1 in. over factory ride height. These springs are also the exact same ones used in Roush's 2005-10 suspension system, which is the same system used on most Roush-built 2005-10 Mustangs.
Product highlights for the Mustang lowering springs:
* Fits 2005-14 Mustang (both GT and V6 applications)
* For a more "extreme" drop on your Mustang, please reference Roush's Extreme Lowering Springs
* Includes four springs total (two for the front, two for the rear)
* Includes detailed installation manual
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Instructions & Calculators
Some parts are not legal for use in California or other states with similar laws / regulations
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