Introduction
If you've looked at the StreetPro package, using the standard springs in the H&R Street Performance kit and wanted better spring rates that were more balanced and tailored to track use, this is the kit for you. We swap out the H&R springs that are too soft up front for our track tested 514 lb/in front and keeping the H&R 500 lb/in rear spring rates. This change in spring rate dramatically reduces brake dive and roll in corners vs any "lowering spring" offered for this chassis!
This kit is built around the H&R monotube struts, shocks and ride height adjusters. We add front Eibach springs that match the H&R parts, a pair of Vorshlag camber plates, and an option for our Vorshlag spherical rear shock mounts.
A good percentage of S550 Mustang buyers are looking for a lower ride height and firmer spring rates and better damping, but don't want or need damping adjustments or a $5000 coilover kit. If you are reading this, you might be one of those folks. Maybe you want to compete in some autocrosses or HPDE track events? Or you have a favorite canyon road you want to attack without the marshmallow Mustang suspension letting the car flop around?
In order to handle well for performance driving, you need to lower the center of gravity (cg), increase spring rates over stock (especially up front), use better dampers (monotubes, not twin tubes), and add negative camber up front (adjustable camber plates). If this sounds like what you need, Vorshlag has the answer, with a German made set of H&R monotube coilovers, our unique spring rates, and Vorshlag adjustable camber-caster plate top mounts. One major suspension upgrade, all in one box!
This H&R Street Performance kit, tuned up with a more balanced spring package is a ready-to-install suspension for a multipurpose S550 Mustang. The shortened H&R inverted monotube struts and rear shocks are teamed with a pair of stiffer Eibach front springs. This kit offers ride height adjustment, on the strut in the front and at the stock spring location in the rear. They will come fully assembled, ready to install. Having this system pre-assembled by Vorshlag means it does not require a spring compressor to install.
Key Features
- Monotube front struts that utilize 36mm dia. pistons and 40mm inverted shafts that maximize deflection resistance under hard cornering loads
- Front struts are 1.25" shorter than the OEM length, for more bump travel at the lower ride height (from the matched lowering springs)
- Monotube rear shocks that utilize new OEM-style rear upper shock mounts
- Rear shocks are 1.5" shorter than the OEM length.
- Nitrogen charged for exceptional fluid foaming resistance on track
- Valved for a comfortable street ride with the matched lowering springs, with improved track performance, lower cg, and (with camber plates) adjustable front alignment specs.
- No valving adjustment on the dampers - less to fiddle with!
- This system fits all 2015-2024 Mustangs WITHOUT Magnaride Suspension
- Four corner ride height adjustment, to get the stance where you want and also to set corner balance
- Great price for a complete damper/spring/camber plate suspension kit
- Front spring rate is 514 lbs/in
- Rear spring rates from 480-600 lbs/in in the working range
Standard Parts Included:
- 2 Front H&R inverted monotube struts, inverted shaft, height adjustable
- Vorshlag camber plates
- 2 Rear H&R monotube shocks
- 2 Rear ride height adjusters
- Front linear springs
- Rear dual-rate springs
- Pair of spring perch adjuster wrenches
- Bottle of Boeshield T-9 lube for the threads
OPTIONAL SPHERICAL REAR MOUNTS: The only performance option we offer with this kit is our Vorshlag spherical rear shock mounts.
OPTIONAL ORIGINAL SPRINGS: An option we offer with this kit is the original H&R springs. They come with the base Street Performance kit, but are removed for the stiffer Eibach front springs. We normally do not send the original springs, but if you'd like them, we can package them up in their own box and send them as an option.
