Two Valve Triton Tool Kit — 38900 Spark Plug Thread Repair Kit quickly restores stripped spark plug threads on compatible 4.6 L, 5.4 L, and 6.8 L V-10 two-valve engines. This foolproof system lets you install oversized inserts without removing the cylinder head, helping prevent repeat blow-outs and saving the high cost of head replacement.
Everything in the kit is selected for dependable service life and straightforward DIY or shop installation.

Include:
✔ Oversized M14-1.25 Inserts × 8 (389-100)
✔ Twist Drill × 1
✔ Thread Tap × 1
✔ Alignment Guide × 1
✔ Cylinder Leak Tester × 1
✔ Snap Retainers × 2
✔ Storage Case × 1

When to Repair Your Threads:
✔ Spark plug blow-out or loose fit in the cylinder head
✔ Misfires, ticking, or compression loss near the plug well
✔ Routine service on high-mileage two-valve modular engines

Repair Benefits:
✔ Restores secure spark-plug seating in about 30 minutes
✔ No cylinder-head removal required, lowering labor time and cost
✔ Complete kit supports both driveway and professional repairs

Compatibility:
Compatible with Ford F-150;(4.6 L / 5.4 L)
Compatible with Ford F-250 / F-350;(4.6 L / 5.4 L / 6.8 L V10)
Compatible with Ford E-150 / E-250 / E-350;(4.6 L / 5.4 L / 6.8 L V10)

Note:
✔ Designed for two-valve cylinder heads using M14-1.25 spark plugs
✔ Confirm engine size, model year, and thread specification before purchase
✔ Professional installation or advanced DIY skill is recommended