Accel S/PLUGS BT48-75 U-GROOVE

High-performance U-Groove spark plugs engineered to deliver stronger ignition, improved combustion, and better overall engine response for classic Big Twin models.

Features

• Patented U-shape ground electrode creates a wider, hotter spark

• Heavy-duty 5-rib insulators help prevent flashover

• High-quality copper/nickel alloy electrode for durability

• Highly foul-resistant and dissipates heat better than standard materials

• Improves engine efficiency and helps reduce emissions

• Enhanced throttle response and fewer misfires

Fitment

• Big Twin: 1948–1975