Autolite 3910X High-Performance Spark Plug for Stock Motors
4.5 (1,234)
Sold 100+ last 30 days
20% off first order
$7.72
Color
Black
Quantity
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Quantity
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Description
Replacement racing spark plug used by many professional race car drivers
Unique, special designed shell with 'X-gap' groove to run cooler and allow for improved flame kernel development
3/4in reach gasket seat with 14mm threads