Brand ?PHILTOP Part Spark Plugs OEM Part Number 3186, 3013, 4511, 5325, 4713, AP104, TR55GP, 3403, 7397, PT16TT, APP104, TR5IX, 6709, SP432 Center Electrode Core Material Copper Center Electrode Tip Material Platinum Ground Electrode Core Material Platinum Ground Electrode Tip Design Trapezoid Ground Configuration Standard Ground Electrode Quantity 1 Electrical Terminal Type Non-Removable Nut Pre-Gap Size .040 in/1.016 mm Resistance 5000 Ohms Manufacturer Part Number ? Hex size 5/8 in/15.875 mm Insulator Height 53.00 mm Manufacturer Heat Range 5 Seat Type Tapered Reach .708 in/18.00 mm Thread Diameter 14.00 mm [Faster Starts] The platinum spark plug enhances the center electrode design, concentrating spark energy and improving vehicle ignitability. It leads to smoother engine operation and eliminates misfire concerns. [Longer Lifespan] PHILTOP automotive spark plugs feature platinum construction for durability and resistance to heat and corrosion. They effectively burn off carbon deposits, extending the plug's lifespan. [Fuel Economy] The oe fine wire iridium center wire tip design promotes optimal combustion and reduces carbon buildup. The external sealing gasket prevents gas leakage, enhancing fuel efficiency. [Trivalent metal coating] The spark plug offers high temperature durability and robust construction, with excellent resistance to corrosion and seizure, ensuring easy installation and disassembly. [Solid copper core] 98% pure copper core provides excellent heat dissipation, conductivity and ultra-wide thermal range. PHILTOP TR5GP Spark Plugs 8 Pack Material: PlatinumElectrical Terminal Type: Non-Removable NutPre-Gap Size: 0.040 inHex Size: 5/8 inInsulator Height: 53.00 mmHeat Range: 5Reach: 0.708 inThread Diameter: 14.00 mmResistance: 5000 Ohms Please confirm that the spark plug fits your vehicle (Year+Make+Model+Engine Size) before buying! Make sure that the ignition gap is correctly selected before purchasing! A recommended is ignition coil and spark plug be replaced together to avoid common dysfunctions! Reference Number: 3186, AP103, TR5GP How To Install The Plug Set? Why To Choose PHILTOP Spark Plugs? Finer Center Electrode Materials with high melting point refuse to accumulate carbon, and the side electrode technology extending its service life Higher Speed Start Requires less voltage and produces a strong spark for improved ignition performance and faster and easier starting Less Fuel Consumption Iridium electrodes and gaps improves the ignition curve, allowing fuel to burn efficiently and reducing emissions Smoother Driving Experience Accelerates more steadily, rejecting jerks, jams and sharp jumps,bring you back to smooth driving experience