OE Quality
60-Day Returns

Dorman 611-058 Wheel Lug Nut - Front, Rear or Rear Right
Durable Steel Wheel Lug Nuts for Ford E-350 and F-350
The Dorman 611-058 wheel lug nuts are engineered to provide secure and reliable fastening for your Ford E-350 Econoline, E-350 Econoline Club Wagon, and F-350 models. Crafted from steel with a zinc finish, these lug nuts offer corrosion resistance and long-lasting performance.
- Material: Steel construction with zinc coating for durability
- Thread Direction: Clockwise for standard installation
- Thread Type: Fine thread with 9/16-18 thread size
- Seat Style: 90-degree conical seat for proper wheel fitment
- Hex Size: 1-1/16 inch for compatibility with common lug wrenches
- Open End Design: Yes, allowing easier access during installation
- Package Contents: 10 wheel lug nuts per set
- Grade Type: Regular grade suitable for standard wheel applications
- Thread Diameter: 9/16 inch SAE specification
Product Details and Specifications
The Dorman 611-058 wheel lug nuts are designed specifically for select Ford trucks, including the E-350 Econoline, E-350 Econoline Club Wagon, and F-350. These lug nuts feature a fine thread pitch (9/16-18) and a 90-degree conical seat style, ensuring a secure fit that matches factory specifications. The zinc finish helps resist rust and corrosion, extending the life of the lug nuts under various driving conditions. With an overall length of 0.656 inches and a hex size of 1-1/16 inch, these lug nuts are compatible with standard tools and provide reliable wheel attachment without the need for a wheel lock key.
Compatible Applications and Common Uses
- Replacement lug nuts for Ford E-350 Econoline and Club Wagon models
- Secure fastening for Ford F-350 wheels
- Addressing stripped or damaged lug nuts
- Upgrading worn or corroded wheel hardware
- Ensuring proper wheel fitment and safety
Installation Notes and Tips
When installing the Dorman 611-058 wheel lug nuts, ensure the threads are clean and free of debris to prevent cross-threading. Use a torque wrench to tighten the lug nuts to the manufacturer’s recommended specifications for your Ford E-350 or F-350 model. The open end design facilitates easier access during installation and removal. Since these lug nuts do not require a wheel lock key, they simplify maintenance and tire changes.
Quality Assurance and Warranty Information
Dorman wheel lug nuts are manufactured to meet OEM standards for fit, form, and function. Made from durable steel with a protective zinc coating, these lug nuts provide consistent performance and corrosion resistance. While no specific warranty details are provided, Dorman products typically undergo rigorous quality control to ensure reliability for your Ford E-350 Econoline and F-350 vehicles.
| Brand | Dorman |
|---|---|
| Part Number | 611-058 |
| Color | Zinc |
| End Type | Standard |
| Grade Type | Regular |
| Hex Size | 1-1/16 in |
| Material | Steel |
| Open End Design | Yes |
| Overall Length | 0.656 |
| Package Contents | 10 Wheel Lug Nuts |
| SAE or Metric | SAE |
| Seat Style | Conical Seat - 90 deg |
| Thread Diameter | 9/16 |
| Thread Direction | Clockwise |
| Thread Size | 9/16-18 |
| Thread Type | Fine |
| Washers Included | No |
| Wheel Lock Key Included | Not Required |
This part fits 56 vehicles. Search below:
| Year | Make | Model | Drive Type | Position | Notes |
|---|---|---|---|---|---|
| 1984 | Ford | E-350 Econoline | Front | Open Design; w/Dual Rear Wheels (DRW); To 12/31/83; Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment | |
| 1984 | Ford | E-350 Econoline | Rear Right | Open Design; w/Dual Rear Wheels (DRW); To 12/31/83; Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment | |
| 1984 | Ford | E-350 Econoline Club Wagon | Front | Open Design; w/Dual Rear Wheels (DRW); To 12/31/83; Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment | |
| 1984 | Ford | E-350 Econoline Club Wagon | Rear Right | Open Design; w/Dual Rear Wheels (DRW); To 12/31/83; Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment | |
| 1984 | Ford | F-350 | RWD | Front | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. |
| 1984 | Ford | F-350 | Rear Right | Open Design; w/Dual Rear Wheels (DRW); To 12/31/83; Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment | |
| 1983 | Ford | E-350 Econoline | Front | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1983 | Ford | E-350 Econoline | Rear | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1983 | Ford | E-350 Econoline Club Wagon | Front | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1983 | Ford | E-350 Econoline Club Wagon | Rear | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1983 | Ford | F-350 | RWD | Front | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. |
| 1983 | Ford | F-350 | Rear Right | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1982 | Ford | E-350 Econoline | Front | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1982 | Ford | E-350 Econoline | Rear | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1982 | Ford | E-350 Econoline Club Wagon | Front | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1982 | Ford | E-350 Econoline Club Wagon | Rear | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1982 | Ford | F-350 | RWD | Front | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. |
| 1982 | Ford | F-350 | Rear Right | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1981 | Ford | E-350 Econoline | Front | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1981 | Ford | E-350 Econoline | Rear | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1981 | Ford | E-350 Econoline Club Wagon | Front | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1981 | Ford | E-350 Econoline Club Wagon | Rear | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1981 | Ford | F-350 | RWD | Front | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. |
| 1981 | Ford | F-350 | Rear Right | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1980 | Ford | E-350 Econoline | Front | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1980 | Ford | E-350 Econoline | Rear | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1980 | Ford | E-350 Econoline Club Wagon | Front | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1980 | Ford | E-350 Econoline Club Wagon | Rear | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1980 | Ford | F-350 | RWD | Front | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. |
| 1980 | Ford | F-350 | Rear Right | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1979 | Ford | E-350 Econoline | Front | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1979 | Ford | E-350 Econoline | Rear Right | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1979 | Ford | E-350 Econoline Club Wagon | Front | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1979 | Ford | E-350 Econoline Club Wagon | Rear Right | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1979 | Ford | F-350 | RWD | Front | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. |
| 1979 | Ford | F-350 | RWD | Rear Right | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. |
| 1978 | Ford | E-350 Econoline | Front | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1978 | Ford | E-350 Econoline | Rear Right | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1978 | Ford | E-350 Econoline Club Wagon | Front | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1978 | Ford | E-350 Econoline Club Wagon | Rear Right | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1978 | Ford | F-350 | Front | Open Design; Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment | |
| 1978 | Ford | F-350 | Rear | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1977 | Ford | E-350 Econoline | Front | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1977 | Ford | E-350 Econoline | Rear Right | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1977 | Ford | E-350 Econoline Club Wagon | Front | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1977 | Ford | E-350 Econoline Club Wagon | Rear Right | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1977 | Ford | F-350 | Front | Open Design; Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment | |
| 1977 | Ford | F-350 | Rear | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1976 | Ford | E-350 Econoline | Front | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1976 | Ford | E-350 Econoline | Rear Right | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1976 | Ford | F-350 | Front | Open Design; Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment | |
| 1976 | Ford | F-350 | Rear | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1975 | Ford | E-350 Econoline | Front | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1975 | Ford | E-350 Econoline | Rear Right | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. | |
| 1975 | Ford | F-350 | Front | Open Design; Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment | |
| 1975 | Ford | F-350 | Rear | Fitment Note: Open Design; w/Dual Rear Wheels (DRW); Package Quantity: 10; Packaging Type: Box; Color: Zinc; Steel; Thread Size: 9/16-18; Overall Length: 0.656 in; Standard; Thread Direction: Right Hand Thread; Verify lug nut to wheel mating surface for proper and safe fitment. |
* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
This part directly replaces or is cross-referenced with the following part numbers:
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.