MSD 5540 spark plug wire set for the 1977-1979 Ford F-150 V8 6.6L or 7.5L, the 1980-1996 F-150 V8 5.8L and other vehicles carries high-voltage current to each spark plug. These MSD Ignition spark plug wires come in a black sleeve, with black boots over the terminals.
- Street Fire™ line, HEI style
- Helically wound conductor suppresses electro and radio noise
- Kevlar core for strength and durability
- 8mm silicone and synthetic jacket resists heat and abrasion
- Low resistance conductor rated 500 Ohms/ft. for spark delivery and power
- Multi-angle silicone boots protect against high exhaust temperatures; heavy duty terminals hold a secure connection
Quick facts
- Part: MSD 5540 spark plug wire set
- Fits: the 1977-1979 Ford F-150 V8 6.6L or 7.5L, the 1980-1996 F-150 V8 5.8L and other vehicles
- Condition: New
Misfires, a rough idle, hard starting, or cracks and burn marks on a wire or boot can mean the wires are worn, though worn spark plugs or a failing ignition coil can be behind the same signs, so find the cause before you replace anything.
Fits
Among the vehicles it fits, besides the ones in the first sentence, are the 1988-1996 Ford F-250 V8 5.8L and the 1995 Ford Mustang V8 5.8L. The 1995 Ford Mustang V8 5.8L, for one, takes one set. If your truck or car is not named here, look up your year, model and engine in the "Vehicles it fits" section on this page.
Specifications
Fit and size
- Quantity per vehicle: 1 set
- Style: HEI
- Boot type: Multi-angle
Build and materials
- Boot material: Silicone
- Jacket: 8mm silicone and synthetic
- Core: Kevlar
- Conductor: Helically wound, 500 Ohms/ft. resistance
- Condition: New
- Country of origin: Mexico
Frequently Asked Questions
Is MSD 5540 the right spark plug wire set for the 1980-1996 Ford F-150 V8 5.8L?
Yes. MSD 5540 fits the 1980-1996 Ford F-150 V8 5.8L, and also the 1977-1979 F-150 with the V8 6.6L or 7.5L.
Can I use this set as Mustang spark plug wires on a 1995 Ford Mustang V8 5.8L?
Yes. MSD 5540 fits the 1995 Ford Mustang V8 5.8L, and that car takes one set.
How much resistance does the MSD Ignition spark plug wire set have?
The conductor is rated 500 Ohms/ft. It is helically wound to suppress electro and radio noise.
Are the boots on this spark plug wire set made of silicone?
Yes. The boots are silicone and protect against high exhaust temperatures. The jacket is 8mm silicone and synthetic that resists heat and abrasion.
What should I look for on a spark plug wire set like the MSD 5540 that is wearing out?
With the engine off and cool, look at the wires and boots for cracks, burn marks or a brittle jacket. A shop can also test wire resistance.
