/live/media/SW/SW_6658_Fro.jpg)
OE Quality
60-Day Returns
/live/media/SW/SW_6658_Fro.jpg)
/live/media/SW/SW_6658_Con.jpg)
Standard IgnitionPart #: 6658
Standard Ignition 6658 Spark Plug Wire Set
⚙️ 18 vehicles fit this part
Select your vehicle to confirm fitment
Verify this part fits before purchasing — free returns if it doesn't
$65.97Free Shipping
🚚Free ShippingNo Cost to Continental U.S.
🔄Free Returns*Wrong fit? No cost
🛡️60-Day ReturnsMoney back guarantee
*Free return shipping only qualifies if our fitment verification tool is used.
🔥
✅ In Stock · Ready To Ship
Most orders ship same-day if ordered before 1pm CST.
✅OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Ford and Mercury, Cougar and Thunderbird
🔄Easy Returns — Return within 60 days for a full refund
🚚Fast Shipping — Most orders ship same business day before 1pm CST
Not what you need? Click here for all Spark Plug Wire Set options
Standard Ignition 6658 Spark Plug Wire Set
This part fits 18 vehicles. Search below:
| Year | Make | Model | Liters | Cylinders | Position | Notes |
|---|---|---|---|---|---|---|
| 1997 | Mercury | Cougar | 3.8L | V6 | N/A | |
| 1996 | Ford | Thunderbird | 3.8L | V6 | N/A | |
| 1996 | Mercury | Cougar | 3.8L | V6 | N/A | |
| 1995 | Ford | Thunderbird | 3.8L | V6 | N/A | w/o Calif. Emissions |
| 1995 | Mercury | Cougar | 3.8L | V6 | N/A | Compatible with vehicles equipped with Federal Emissions. |
| 1994 | Ford | Thunderbird | 3.8L | V6 | N/A | w/o Calif. Emissions |
| 1994 | Mercury | Cougar | 3.8L | V6 | N/A | Compatible with vehicles equipped with Federal Emissions. |
| 1993 | Ford | Thunderbird | 3.8L | V6 | N/A | |
| 1993 | Mercury | Cougar | 3.8L | V6 | N/A | |
| 1992 | Ford | Thunderbird | 3.8L | V6 | N/A | |
| 1992 | Mercury | Cougar | 3.8L | V6 | N/A | |
| 1991 | Ford | Thunderbird | 3.8L | V6 | N/A | |
| 1991 | Mercury | Cougar | 3.8L | V6 | N/A | |
| 1990 | Ford | Cougar | 3.8L | V6 | N/A | |
| 1990 | Ford | Thunderbird | 3.8L | V6 | N/A | |
| 1990 | Mercury | Cougar | 3.8L | V6 | N/A | |
| 1989 | Ford | Thunderbird | 3.8L | V6 | N/A | |
| 1989 | Mercury | Cougar | 3.8L | V6 | N/A |
* 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:
31530333084143E9PZ12259A
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.