NGK Spark Plug R5671A9 crosses to AR3933
Crosses to AR3933 and doesn’t mess around—this is a straight-up race plug for high-compression chaos and WOT living. The NGK R5671A-9 is cold, non-resistor, short reach, and made to handle the kind of abuse that melts lesser plugs.
If your setup is spicy, this is the plug that keeps it lit without flinching. Add to cart and let the ignition party begin.
Spark Plug, Racing, Gasket Seat, 14mm Thread, .750 in. Reach, Non-Resistor, Each
Store Policies
We’re splitting the difference! In-stock items will be shipped right away, and we’ll send the rest as soon as they hit the shelves. If any backordered items are expected to take longer than 5 days, we’ll reach out to let you know what’s up and keep you in the loop.