Denso 4512 Spark Plug

Denso Platinum TT Spark Plug 4512

Denso Platinum TT 4512 is a tapered-seat spark plug built for consistent ignition performance across a wide range of Ford, Chevrolet, Cadillac, Audi, and other applications. Its twin-tip design promotes faster flame propagation for more complete combustion, while the platinum center electrode supports stable firing characteristics.

Key Features

• Twin-Tip ground electrode design for quicker flame travel
• Platinum center electrode tip for durable ignition performance
• Copper core center electrode for efficient heat transfer
• Nickel ground electrode core material
• 5000 ohm resistance
• Pre-gapped at 1.0 mm
• Tapered seat, 14.00 mm thread diameter, 18.00 mm reach
• 16.0 mm hex size for standard service tools

Product Details

The Denso Platinum TT line focuses on controlled spark delivery and combustion efficiency. On part number 4512, the titanium enhanced twin-tip ground electrode helps the spark kernel develop quickly, which can support smoother combustion in engines that call for this plug specification. The platinum tip and copper-core construction are selected to balance ignition durability with heat management, making this spark plug a practical service replacement for many import and domestic engines.

This part cross-references DENSO Auto Parts PT20TT for the same application.

Common Issues This Spark Plug Can Address

• Rough idle caused by worn or inconsistent spark plugs
• Hard starting from weak ignition output
• Misfire conditions related to degraded plug electrodes
• Reduced throttle response from incomplete combustion
• Fuel economy loss tied to inefficient ignition performance

Installation Notes and Fitment Tips

Compatible With 2009-2015 Cadillac CTS, N/A; 2012-2015 Chevrolet Camaro, N/A; 2006-2013 Chevrolet Corvette, N/A; 2005-2010 Ford Mustang, N/A; 2005-2008 Ford F-150, N/A; 2006-2010 Ford Explorer, N/A; 2007-2010 Ford Explorer Sport Trac, N/A; 2007-2010 Mercury Mountaineer, N/A; 2005-2007 Land Rover LR3, N/A; and many additional applications listed in the fitment data. Verify engine-specific plug requirements, thread reach, seat type, and heat range before installation. The pre-gap is set to 1.0 mm, but final verification against the vehicle service specification is recommended during routine ignition service.

Quality Assurance

Denso manufactures the Platinum TT line with OE-style engineering and application-specific specifications. Part number 4512 is built to match the listed fitment and ignition requirements for service replacement use.