While many will be quick to just purchase OE replacements straight from a dealership ... and water-tight seal, while the terminal design improves spark plug retention and assists installation ...

More specifically, how about those spark plug wires you're running ... Your exhaust will also dictate what plug terminal boots to use-90-degree or straight. More often than not, tight headers ...

See All 17 Photos Enough of the copper core needs to be exposed to fit the secondary crimp area of the terminal ... The MSD multi-angle spark plug boots can be safely bent to a 90-degree angle ...