There is a lot to consider when choosing the proper spark plug for your engine's intended application and power level. Let us take some of the guesswork out with our spark plug buyer's guide.

Performance Spark Plug Buyer’s Guide

Learn about some of the differences between factory plug wires and the improvements you'll receive with a quality set of aftermarket performance wires in our spark plug wire buyer's guide

Selecting The Best Performance Spark Plug Wires

Learn how to install spark plug wire terminal ends. Our step by step guide takes you through terminal end and boot installation with the use of a wire crimping tool.

How To Crimp Spark Plug Wires and Install Boots

In preparation to transplant a 430hp 383 stroker into Project Chevelle, Zach R. made up a set of plug wires for the car. To keep it nice and tidy they needed to be routed just right, be the perfect length and not distract from the engine!

Perfect Fit Spark Plug Wires

Spark Plug Cross Reference Guide

Bringing an old Mopar back to life isn't always a breeze. Fortunately, MSD has come up with a solution for those outdated and unreliable points-type ignition systems. Find out how to install a MSD 8386 distributor and MSD 5531 spark plug wires

Ignition Upgrades for Classic Mopar Muscle

A new print and digital magazine about all things classic truck and more, brought to you by some familiar names.

Classic Truck Performance

Speedway Tech Zach discusses the Pertronix Ignitor III conversion in his '55 Chevy.

Installing a Pertronix Ignitor III

Instructions on how to install a PerTronix Ignitor Kit in an old flathead distributor for a flathead V8.

PerTronix Ignitor Install

Engine Family Facets

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Classic Truck NGK Iridium IX Spark Plugs Parts

Classic Truck NGK Iridium IX Spark Plugs Parts | Speedway Motors

Shop Classic Truck NGK Iridium IX Spark Plugs Parts and get Free Shipping on orders over $175 at Speedway Motors.

Classic Truck NGK Iridium IX Spark Plugs Parts

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NGK N7397 Spark Plug TR51X Iridium IX Spark Plug