Product Summary
74-78 Mustang II, 74-80 Pinto, 75-80 Bobcat, Natural
- Specially designed for the Mustang II platform
- Includes brand new stamped steel upper and lower control arms with polyurethane bushings
- The 11″ brake kit features GM Metric-style calipers and rubber hoses
- Available in your choice of 5 x 4-1/2″ or 5 x 4-3/4″ bolt patterns
- Coms with rack and pinion, bushings, and necessary tie rods
Installation Tips !
Note: Applications where the vehicle has fenders that mount directly on top of the frame, the fenders will require extensive modification to allow clearance for the upper cross member section.
Note: These kits require the purchase of a Mustang II crossmember (sold separately). Many of our Speedway and Heidts brand crossmembers will work with Manual Rack and Pinion Steering ONLY. When purchasing our crossmembers, be sure to look for their correspondence with power racks if selecting a power rack with our Mustang II IFS kits. With all Mustang II aftermarket crossmembers, spacers and longer bolts must be used with the later (Fox-body) power rack (spacers included).
Finding the right control arms means finding the correct track width: Our Mustang II kits feature 11″ rotors. Track width, which is hub face to hub face where the wheels bolt on, will be 57.5″. Wheel and tire combination and customer preference determine whether to use the standard control arms or the 5/8″ narrower. The narrower control arms reduce the track with by a total of 1.25″. See the link below for various track widths with different options.
When used in conjunction with upgraded disc brake kits, due to possible interference between the end of the control arm and the brake rotor when at ride height, it may be necessary to remove minimal material from the end of the control arm to achieve adequate clearance at this location.
Details
You get brand new stamped steel upper and lower control arms with polyurethane bushings, new steel spindles, coil-over shock & spring, new manual rack & pinion with bushings or remanufactured power rack & pinion with bushings, and an 11″ brake kit featuring GM Metric-style calipers and rubber hoses, with your choice of 5 x 4-1/2″ or 5 x 4-3/4″ bolt patterns.
- Works with most Speedway and Heidts crossmembers (be sure to check control arm correspondence when choosing crossmember for your vehicle)
- These kits are compatible with your application based on which crossmember you have.
- Kit Includes:
- New stamped steel upper and lower control arms with polyurethane bushings
- New steel spindles
- Coil-over shock & spring
- Rack and Pinion with bushings and tie rods
- 11″ brake kit with GM calipers
- Crossmember NOT included – Add proper crossmember to complete kit.
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Spring Rate Chart (Link)
Note: These IFS kits will require use of strut rods and brackets for the lower control arms. These kits will work with our replacement strut rod and brackets. If using the stock style control arms we suggest using the tubular strut rod for additional clearance and better suspension geometry.
Note: Additional items may be needed to complete installation. You may want to include our Mustang II ride height adjusters for installation with these IFS kits to fine tune your final ride height up to 2″.
Note: If using these kits with Speedway or Heidts crossmembers for 1948-1956 Ford Pickups, 1955-1959 Chevy Pickups, or universal crossmembers for 27-1/2″ – 33-1/2″ frame widths, you will be required to purchase 2″ Inner Tie Rod Extensions
Item Details
Must include Mustang II crossmember for complete installation (sold separately)
Charts
Guides & Documents
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Front Suspension Kits Instruction Sheet (91034200)(PDF)
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Front Suspension Kits Instruction Sheet (91034200)(PDF)
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Front Suspension Kits Guide/Document (91034200)(JPG)
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Disc Brake Pads Guide/Document (9193381)(JPG)
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Spindles Instruction Sheet (91034307)(PDF)
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Bolts Instruction Sheet (91034342-2)(PDF)
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Bolts Instruction Sheet (91034342-3)(PDF)
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Coil Springs Guide/Document (2558M)(JPG)
KEY SPECS |
|
|---|---|
| MFG. Part # | 91034342 |
| Brand | Speedway Motors |
| Front Suspension Type | IFS |
| Suspension Height Adjustment | Stock Height |
| Control Arm Style | Stamped |
| Shock Type | Mono Tube |
| Spring Type | Coilover |
| Finish | Natural |
| Bolt Pattern | Select Bolt Pattern to see |
| Rotor Diameter | 11 Inch |
| Spindle Style | Ford Stock |
| Dropped Spindles | No |
| Dropped Axle | No |
| Dropped Control Arms | No |
| Spindles Included | Yes |
| Brakes Included | Yes |
| Steering Included | Yes |
| Caliper Pistons | Single |
| Caliper Finish | Natural |
| Shock Adjustability | Single Adjustable |
| Rotor Type | Solid/Vented |
| Welding Required | Yes |
Brake Pad Identification and Friction Surface Options Explained
Looking for some great street or racing brake pads for your muscle car, truck, or race car? You’ve come to the right place. From stock GM metric calipers used in plenty of disc brake conversions and in some classes of oval track racing to full on “big brake” packages, at some point in your vehicle’s life you’re going to need new pads. It doesn’t matter if you’re upgrading for a weekend track day or your race car’s pads are shot and need to be replaced before the next Saturday main event, we have what you need here at Speedway Motors.
If you’re trying to match up a new set of brake pads and you’re unsure which Wilwood caliper you have, the pad infographics shown below provide the dimensions of each pad, along with the caliper that it will fit. For OE-style calipers it helps to know the Friction Materials Standards Institute (FMSI) D-number. You can usually find this number somewhere on the pad backing plate or edge of the friction material. For example, GM’s extremely popular 1977-1988 “metric” calipers use a D154 pad. No matter the brand or friction material/compound, the D154 denotes the actual fitment to that caliper.
Wilwood Disc Brake Pad Offerings
- ProMatrix– Street performance/OEM replacement pad that is quiet-running with low dust, and low rotor abrasion. Fade resistant dual sport pad for street cars that autocross or do on-track events, as well as trucks that tow or have oversize wheels/tires. Popular for drag racing and off-road.
- PolyMatrix Q– Used with aluminum rotors in Sprint or Midget racing. Q pads are a ceramic formula to be quiet and low dust, with a smooth engagement.
- PolyMatrix E– Used with iron or steel rotors. Very consistent driver feel through entire operating range. Excellent street pad that can be used for track days and autocross, but also works well off-road and for drag racing.
- PolyMatrix B – Used with iron or steel rotors. Medium-high friction, good cold response. A race only pad popular for road courses, dirt and paved oval track, and off-road use, which works good at low temperatures but gets even more aggressive as it gets hot.
- PolyMatrix A– Used with iron or steel rotors. Very consistent driver feel through entire operating range. Wilwood’s most aggressive pad for road course, paved oval and dirt.
- SmartPad BP-10, BP-20, BP-30, BP-40 – These pads get increasingly aggressive as the numbers go up. BP-10 is usually what is included in Wilwood street brake kits. BP-20 is more aggressive. BP-30 and BP-40 are serious race pads, for professional road racing and asphalt oval track, and need to get hot before they really work well
Hawk Performance Disc Brake Pad Offerings
- HPS – Used on iron or steel rotors. High friction/torque hot or cold. Gentle on rotors, low noise. Much improved over stock braking.
- HP PLUS – Used on Iron or steel rotors. Extremely high friction. Works well for dirt and autocross. Elevated temperature resistance.
- BLACK – Used on iron or steel rotors. Excellent stopping power and good fade resistance at low to medium temperatures. Very rotor friendly with long pad life. Good dirt track or mild asphalt use.
AFCO Disc Brake Pad Offerings
- SR32 – Developed for the right fronts of dirt cars where low grip is needed to help build bias in the front brake system and help the car turn better when you have to use 4 wheel brakes.
- C1 – Designed for medium to low brake temperatures and provides good cold bite while being rotor friendly. The pad is best used on IMCA style modifieds, the fronts of “Outlaw” style modifieds, drag racing, and most street applications.
- SR33 – Developed for improved stopping power over the standard C1 compound and has a wider temperature range that will reduce brake fade. The compound is made for the front and rear of dirt cars and rear asphalt cars where a medium grip pad is needed.
- C2 – Designed for a wide range brake temperatures and provides excellent cold bite and aggressive braking power. The pad is best used on rear of IMCA style modifieds, the rears of “Outlaw” style modifieds, fronts of asphalt cars, and outlaw drag racing.
- SR34 – Developed for improved stopping power over the standard C2 compound for rear dirt cars and front asphalt cars. The higher temperature range (200-1,600 degrees) makes this pad very versatile and resistant to fade while at the same time giving you a heavy grip pad with reduced rotor wear.
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