The ProTek T4 Hot Turbo Glow Plug was developed to provide nitro enthusiasts with an affordable, general purpose turbo plug. The T4 "Hot" heat range plug is a good general purpose plug recommended for .12 to .21 size engines running 10 - 36% nitro in most climate conditions.

Heat Range Options:

• PTK-2550: T3 Turbo Plug, "Ultra Hot" plug recommended for .12 to .21 size engines running 10 - 36% nitro in cold conditions.
• PTK-2551: T4 Turbo Plug, general purpose "Hot" plug recommended for .12 to .21 size engines running 10 - 36% nitro.
• PTK-2552: T5 Turbo Plug, "Medium" plug recommended for .12 to .21 size engines running 10 - 36% nitro in hot conditions.