NGK 7397 Iridium IX Performance Spark Plug TR5IX


3 in stock

Electrode Material: Iridium
Thread Size: 0.551"
Thread Reach: 0.708"
Ground Electrode Quantity: 1
Gap: 0.040"
Spark Plug Seat Style: Tapered
Heat Range: 5
Longevity: 40-50k Miles
Shape: Taper Cut
Thread Diameter: 14 mm
Overall Height: ISO
Resistance: 5 kOhm
Insulator Height: 53 mm
Center Electrode Core Material: Copper Core
Ground Configuration: Standard
Ground Electrode Core Material: Nickel Core
Ground Electrode Tip Design: Taper Cut
Insulator Type: Projected
Nominal Gap: 0.040"

Designed for outstanding acceleration, high fuel efficiency, and durability
Ensure a consistently stable spark
Extremely high melting point, perfect for today’s high-tech, high-performance engines
Extremely resistant to heat, corrosion and electrical wear
Match OE fit and quality
0.6 mm laser welded iridium tip
Tapered ground electrode
Manufactured using triple-gasket sealing process to prevent leakage through the shell
Alumina silicate insulator for strength and optimal heat transfer
Cold-rolled threads for easier removal and installation
Corrugated ribs eliminate misfire causing “flashover”
Trivalent metal plating
Last 40 to 50 thousand miles

Brand: Brand: NGK
SKU SKU: 7397
Mfg Part #: 7397


TR5IX Iridium IX Performance Spark Plug (7397) by NGK. Designed for performance enthusiasts who want extreme ignitability, improved throttle response and superior anti-fouling, these spark plugs are a great option for modified engines and appropriate replacement for OE spark plugs, where recommended. With a 0.6 mm laser welded iridium tip and taper cut ground electrode, these plugs provide more area for flame expansion for quicker starts, improved performance, and better efficiency.

Additional information

Weight .13 lbs



There are no reviews yet.

Be the first to review “NGK 7397 Iridium IX Performance Spark Plug TR5IX”

Your email address will not be published. Required fields are marked *

SKU: 7397 Category: