Mustang II Suspension Front Springs
74-78 Ford Mustang II, 74-80 Ford Pinto, 75-80 Mercury Bobcat, Front Position, Powder Coated
- Feature a powder coated finish for increased longevity and corrosion prevention
- Made to OEM specs with a 3.5" ID and 13.5" free height
- Available in spring rates from 275 to 425, in 25 lb. increments, allowing you to fine tune your ride quality
- Features a square spring end for the upper hat side ensuring a flush fit for proper compression and alignment
- Features a pigtail spring end for the control arm side, allowing it to be trimmed to fit your setup
Our Mustang II springs come in rates from 275 thru 425 and in 13.5” free height/length. They will require cutting to the necessary length on the majority of applications. For the heavier vehicles such as full size pickup trucks and fat fendered cars the spring rate used will normally be in the 350-400 range. With Small Block and automatic a common rate is 375 to 400 and with the addition of A/C or a big block you will need to compensate for the additional weight and go to the next higher rate. Frame boxing and plating, accessories, and fuel tank size all play a part in selecting spring rate. When vehicle is sitting at ride height ready for test drive the lower control arms should be parallel with the ground or pointing down at a slight angle on the outer ends. The springs will settle some in the first couple of hundred miles so allowance for this should be made.
- Powder coated gloss black
- 13.5" spring length
- 3.50" inside diameter
- Use the spring chart below to select proper rate
Use the following chart to select your rate:
- 1200 lb. Front End Weight = 275 Rate Spring
- 1300 lb. Front End Weight = 300 Rate Spring
- 1400 lb. Front End Weight = 325 Rate Spring
- 1500 lb. Front End Weight = 350 Rate Spring
- 1600 lb. Front End Weight = 375 Rate Spring
- 1700 lb. Front End Weight = 400 Rate Spring
- 1800 lb. Front End Weight = 425 Rate Spring
Our Mustang II springs that we currently offer are all 13.5” long and require trimming to the length needed for each individual application. Weight rating changes as the spring is shortened. When installing in the vehicle the flat end goes up into the upper hat and the end with the “pigtail” goes down into the lower control arm. Spring is rotated when installing to position the pigtail properly. Springs TOO long will have a tendency to NOT sit properly on the lower arms and actually in some cases bow outward causing spring bind.
- Get FREE shipping when your order includes this item and exceeds $99! Ground shipping only in the contiguous US.
More Like This
Mustang II Suspension Front Springs
Mustang II-Pinto Stock Diameter Coil Spring - Chrome
Replacement Springs for Mustang II Coilovers
QA1 8MB375 Coil Spring, 8 Inch, 375lb Rate, Mustang II
QA1 8MB500 Coil Spring, 8 Inch, 500lb Rate, Mustang II
QA1 8MB600 Coil Spring, 600lb Rate, 8 Inch, Mustang II
QA1 8MB700 Coil Spring, 700lb Rate, 8 Inch, Mustang II
8 Inch Spring for Pro Mustang II Coilovers
10 Inch Spring for Pro Mustang II Coilovers
Universal 14 Inch Rear Coil Springs
Q & A
Learn about the importance of getting the chain tension set correctly, and why it is critical that we get it as near perfect as we can. Walkthrough a basic procedure that effectively and consistently gets the chain tension set properly every time.
Learn the proper method of blocking a race car in this step-by-step procedure to follow when performing this task. Learn why consistency is important and a few "not-to-do's".
Learn about Speedway Motor's Fully Assembled Rear Control Arm Kit and how it saves time and hassle. In this video, Joe and Kyle explain the benefits of this new product.
Learn about AFCO shocks and the importance of shock performance while racing. See tips on how to adjust shocks to accommodate track conditions.
Whether you are looking to change the look of your truck, get rid of your tired rusty springs, or upgrade the ride quality of your truck, Speedway Motors has you covered with stock height and lowered spring options.
Check out these great tips and tricks on how to successfully lower the stance on a Chevy Bel Air.
Learn how to mount a traditional transverse rear leaf spring. These tips will help the installation run smoothly and successfully.