[PREMIUM CARBON STEEL CONSTRUCTION] Crafted from high-grade carbon steel, this thread repair insert offers exceptional durability and resistance to extreme temperatures and pressures. The robust material ensures long-lasting performance even under demanding engine conditions, providing a permanent solution for damaged spark plug threads.
[ FIT FOR SPECIFIC ENGINES] Designed with precision engineering, this insert features 3/4-10inch external threads and 14mm x 1.25 internal threads to ly match 4.6 and 5.4 2-valve engines. The specialized threading creates a secure, vibration- connection that restores your cylinder head to optimal functionality.
[SUPERIOR ANCHORING SYSTEM] Unlike standard metric fine threads, our SAE coarse threads anchor deeper into the cylinder head for enhanced stability. The unique design prevents the bushing from screwing in completely and falling into the cylinder, ensuring safe and reliable operation throughout the engine's lifespan.
[COMPREHENSIVE REPAIR SOLUTION] This heavy-duty adapter serves as the fix when previous thread repairs have failed. By drilling out the damaged spark plug hole to 3/4-10inch and using JB-Weld on the outer threads, you create a permanent bond that withstands extreme engine conditions after a 24-hour curing period.
[PROFESSIONAL-GRADE PERFORMANCE] Engineered for mechanics and DIY enthusiasts alike, this insert provides a professional solution to common spark plug thread failures. The substantial construction and precise threading deliver factory-like performance, restoring your engine's compression and power output effectively.

Spec:
Item Type: Thread Repair Insert
Material: Carbon Steel
Function: If you have used a thread repair kit to repair spark plug threads and blown out the adapter, the adapter can repair the thread again.
Size:
External thread 3/4-10inch
Internal 14mm x 1.25 pitch
Length: 7/8 inch
Fitment: For Cylinder Head 4.6 5.4 2 valve