NGK 3691 TR8IX Iridium Spark Plug - Same Day Shipping. Free Returns. PayPal Accepted. Secure Online Ordering. Est. 1969.

NGK Iridium IX spark plugs feature an ultra-fine center electrode that's designed just thick enough to ensure the maximum durability and life of the spark plugs—and just thin enough to create …

NGK Iridium IX plugs offer extreme ignitability and exceptional anti-fouling. Tapered cut ground electrode provides improved starting, idling and throttle response. The Iridium fine wire center electrode's durability is six times harder than platinum. Iridium alloy's extremely high melting point is perfect for today's engines.

2010年5月11日 · Buy 8 New NGK Iridium IX Spark Plugs TR8IX # 3691: Spark Plugs - Amazon.com FREE DELIVERY possible on eligible purchases

2009年1月28日 · Buy NGK (3691) TR8IX Iridium IX Spark Plug, Pack of 1: Spark Plugs - Amazon.com FREE DELIVERY possible on eligible purchases

Buy 4 New NGK Iridium IX Spark Plugs TR8IX # 3691: Spark Plugs - Amazon.com FREE DELIVERY possible on eligible purchases

NGK TR8IX iridium spark plugs for high boost 2007-2014 5.4L and 5.8L GT500 applications (NGK-3691)

Get the Best Performance with NGK Spark Plugs Iridium IX Spark Plug 14mm x .708" Reach TR8IX parts at JEGS. Shop Now at the Guaranteed Lowest Price!

(In Stock) NGK TR8IX Spark Plug Features include: 3 Steps Colder (LS Engines) Projected Insulator Copper Electrode Core Iridium Electrode Tip Sold Individually

8 New NGK Iridium IX Spark Plugs TR8IX # 3691, Iridium IX Plug, 14mm Thread Size, 17.55mm (.691") Reach, 5/8" (16mm) Hex Size, Tapered Seat, Resistor, Solid Terminal Nut, Projected Tip, Fine Wire (0.6mm) Iridium Center Electrode, Tapered Cut Ground Electrode, .040" (1.016mm) Gap, Heat Range 8