Transform your classic Mustang into a modern-handling street machine with QA1’s Level 2 Full Vehicle Handling Kit. Designed specifically for 1964–1966 Mustangs, this system replaces outdated factory suspension with a complete bolt-on package - engineered for balance, adjustability, and ride comfort. From the front control arms to the rear 4-link and 9” housing, every component works together to deliver sharper steering, better traction, and a perfectly tuned stance.
MODERN PERFORMANCE, CLASSIC STYLE
Factory leaf springs and stamped steel components limit performance and ride quality. QA1’s complete suspension system updates your Mustang with modern geometry, adjustable coilovers, and tubular construction that drastically improves handling without compromising ride comfort. The included 9” housing integrates seamlessly with QA1’s triangulated 4-link to create a unified, high-strength foundation ready for serious power.
HANDLING YOU CAN DIAL IN
This Level 2 system includes double adjustable coilovers that allow independent control over compression and rebound, so you can fine-tune ride quality and performance for your exact driving style - whether that’s highway cruising or weekend corner carving.
FRONT-TO-REAR BALANCE
The included tubular upper and lower control arms, front sway bar, and fully adjustable rear 4-link work together to control body roll and maintain optimal suspension geometry. The result is a Mustang that corners flatter and accelerates smoother.
BUILT FOR POWER AND RELIABILITY
The included QA1 9” fabricated housing delivers exceptional strength and serviceability. Featuring heavy-duty 3” OD ¼” wall axle tubes, 31-spline alloy axles, and formed trailing arm brackets, it’s rated up to 800 HP - giving you peace of mind whether your build is mild or wild.
Features:
- Application-specific fit for 1964–1966 Ford Mustangs
- Complete front and rear suspension solution in one kit
- Single adjustable coilovers with 18 rebound/compression settings
- Tubular upper and lower control arms for better geometry and steering response
- Front sway bar reduces body roll and improves cornering stability
- Rear triangulated 4-link eliminates axle wrap and wheel hop
- Fabricated QA1 9” housing with 31-spline 1541H alloy axles rated up to 650 HP
- Heavy-duty 3” OD ¼” wall axle tubes handle up to 800 HP
- Big Ford “New Style Torino” flanges for brake compatibility
- Adjustable front ride height: stock to –2”
- Adjustable rear ride height: stock to –3”
- 5” bolt pattern fits a wide range of wheels
- Durable black powder coat finish
- Comprehensive instructions for straightforward installation
Notes:
- Fits 1964–1966 Ford Mustangs
- Adjustable front ride height: stock to –2”
- Adjustable rear ride height: stock to –3”
- Compatible with QA1 9” housing and 4-link only
- Requires welding for 4-link bracket installation
- Includes 31-spline Ford 9” axles; third member sold separately
WARRANTY / DISCLAIMER
QA1 warrants that the products will be free from defects in material and workmanship for one year from date of sale to the original purchaser. A limited lifetime warranty is offered on select shock absorbers. For registration and more information on the limited lifetime warranty, please visit https://www.qa1.net/Warranty. QA1 makes no other warranty of any kind, express or implied. QA1 shall have no obligation under the foregoing warranty where the defect is the result of improper or abnormal use, your negligence, vehicle accident, improper or incorrect installation or maintenance, nor when the product has been repaired or altered in any way. QA1's liability in the case of defective products subject to the foregoing warranty shall be limited to the repair or replacement, at QA1's option, of the defective products. Consequential or incidental damages are not recoverable under this warranty. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you. This warranty gives you specific legal rights, and you may also have other rights that vary from state to state.
- QA1, in its sole discretion, shall determine whether or not any Eligible Product is defective or otherwise covered by this warranty.
- If the Eligible Product fails to perform properly due to defective materials or workmanship, QA1 will at its option either (i) repair the Eligible Product without charge, or (ii) replace the Eligible Product. If the Eligible Product is no longer available, QA1 will replace the Eligible Product with an equivalent product. No refunds will be provided.
- The warranty provided by QA1 does NOT apply if the Eligible Product fails to perform:
- due to cosmetic wear and tear from normal use;
- due to improper or abnormal use, abuse, neglect, negligence, vehicle accident, insufficient travel, improper or incorrect installation or maintenance; or
- when the Eligible Product has been repaired, replaced, substituted or altered in any way, or if used with parts other than genuine parts of QA1.
- QA1 is not responsible for installation or removal labor, or for any other repair charges associated with the Eligible Product.
- Customer pays shipping to QA1 for final determination on eligibility. Any repaired or replaced Eligible Product will be returned to customer excluding freight cost.
- QA1 shall not be liable for the loss of use of the Eligible Product, loss of time, inconvenience, commercial loss or any other indirect, consequential, special or incidental damages due to breach of the above limited lifetime warranty. QA1 makes no warranties of any kind, express or implied, other than as herein expressly provided, and specifically disclaims the implied warranties of merchantability and fitness for a particular purpose. Notwithstanding anything set forth herein to the contrary, QA1’s liability hereunder shall be limited to the purchase price of the Eligible Product.
In order to be eligible for service under this warranty, you must return the defective part to QA1 together with a RMA. number issued from QA1. Tag each item with the part number and the specific explanation of defect. We will inspect the part and determine: a) if it is eligible for repair or replacement; and, b) if so, whether to repair or replace it. All returns must be shipped prepaid to: QA1 Precision Products, Inc., RMA#__________, 9574 217th Street West, Lakeville, MN 55044.
THE BUYER UNDERSTANDS AND EXPRESSLY RECOGNIZES that racing parts, specialized street rod equipment, rod end bearings, and ALL parts and services sold by QA1 are exposed to many and varied conditions due to the manner in which they are installed and used. BUYER ACKNOWLEDGES that QA1 does not have full knowledge of the intended use of the goods, and BUYER WILL DEFEND AND INDEMIFY QA1 upon demand against all claims, actions, liability, loss and expense (including investigating expense and attorney fees incurred in litigation or because of threatened litigation) for any loss, damage or injury, either to a person or to property, resulting from the direct or indirect use of any QA1 products or inability by the buyer to determine proper use or application of QA1 products. With the exception of the limited liability warranty set forth above, QA1 SHALL NOT BE LIABLE FOR ANY CLAIMS, DEMANDS, INJURIES, DAMAGES, ACTIONS, OR CAUSES OF ACTION WHATSOEVER TO BUYER ARISING OUT OF OR CONNECTED WITH THE USE OF ANY QA1 PRODUCTS. MOTORSPORTS ARE DANGEROUS; AS SUCH, NO WARRANTY OR REPRESENTATION IS MADE AS TO THE PRODUCT'S ABILITY TO PROTECT THE USER FROM INJURY OR DEATH. THE USER ASSUMES THAT RISK.
