NGK 7746 IFR7G-11KS Laser Iridium Spark Plug Honda S2000/Civic Si Acura RSX/CSX

Vehicle Fitment

• 2002-2006 Acura RSX (Base, Type-S, 2.0L I4 DOHC VTEC / K20A2 / K20Z1)
• 2007-2010 Acura CSX (All Trims, 2.0L I4 DOHC VTEC / K20Z2)
• 2006-2011 Honda Civic (DX, EX, EX-L, GX, Hybrid, LX, Si, MUGEN Si, 2.0L I4 / K20Z3)
• 2000-2009 Honda S2000 (Base, CR, 2.0L I4 DOHC VTEC / F20C / F22C1)

Fitment Notes

• Honda Civic fitment covers all trims (2006-2011) including Si and MUGEN Si with the 2.0L K20Z3 engine; does not fit 1.3L Hybrid-only powertrains.
• Honda S2000 CR fitment confirmed for 2008-2009 model years (F22C1 engine).
• Acura RSX Base fitment confirmed; RSX Type-S uses same plug - both are K-series 2.0L I4 applications.
• 4 plugs required per vehicle. Sold individually (1x per unit).

Features

• Fine wire iridium center electrode (1.0mm tip) ensures high-energy spark with minimal voltage demand
• Trapezoid-shaped platinum-tipped ground electrode for even, slow wear and consistent gap over the plug's service life
• Trivalent metal plating provides superior anti-corrosion and anti-seizing protection for easy removal
• High-grade pure alumina ceramic insulator with 98% copper core for optimal heat dissipation and reliable starts
• Triple seals and corrugated ribs prevent combustion leakage and eliminate flashover risk
• OE or OE-equivalent replacement - matches Honda OEM part numbers 98079-571BV, 98079-5717V, and 12290-PRB-A01

Specifications

• Part Number: IFR7G-11KS | Stock Number: 7746
• Center Electrode Tip: Iridium (Fine Wire, 1.0mm) | Ground Electrode Tip: Platinum (Trapezoid)
• Center Electrode Core: Copper | Ground Electrode Core: Nickel
• Thread Diameter: 14.0mm | Thread Pitch: 1.25mm | Reach: 19mm (0.75 in)
• Hex Size: 5/8 in (16mm) | Seat Type: Flat (Gasket) | Insulator Height: 50.50mm
• Pre-Set Gap: 0.044 in (1.1mm) | Heat Range: 7 | Resistance: 5,000 ohms
• Terminal Type: Non-Removable Nut | Ground Electrode Quantity: 1
• Torque - Cast Iron Head: 18-25.3 lb-ft | Aluminum Head: 18-21.6 lb-ft
• OEM Cross Reference: Honda 98079-571BV | Honda 98079-5717V | Honda 12290-PRB-A01

Included Components

• 1x NGK IFR7G-11KS Laser Iridium Spark Plug (Stock No. 7746), pre-gapped at 0.044 in

Product Description

The NGK 7746 (IFR7G-11KS) is a Laser Iridium spark plug engineered as the OE or OE-equivalent replacement for Honda's high-revving K-series and F-series VTEC engines, including those found in the Acura RSX, Acura CSX, Honda Civic Si, and Honda S2000. The fine wire 1.0mm iridium center electrode is optimized for the high-RPM demands of these naturally aspirated engines, delivering a consistent, focused spark that supports the full rev range with minimal voltage requirement. The trapezoid platinum ground electrode works in tandem to minimize gap erosion and extend plug service life.

Pre-gapped at 0.044 in from the factory and featuring a standard 14mm thread and 5/8 in hex, the NGK 7746 installs directly in place of Honda OEM part numbers 98079-571BV, 98079-5717V, and 12290-PRB-A01. Heat range 7 is the correct OEM specification for all applications listed - no adjustment required for stock engines. Sold individually; purchase 4 per vehicle.