For High Compression Applications.

Feature Ribbed Core Technology (RCT) that provides resistance to fouling.

Designed with Original Equipment-style noise suppression to prevent electrical interference with radios and CB communication equipment.

Works great in racing applications where rich air/fuel conditions are required.

Designed for high performance applications involving modifications in high-flow air cleaners, camshafts, exhaust, performance heads, ignition components, higher compression ratios above OE configurations or engines specific for racing applications.

Unique style with Screamin' Eagle® logo.

Sold in pairs.

Fits '99-'17 Twin Cam-equipped models. '86-'22 XL and XR and Evolution® 1340 models equipped with Screamin' Eagle® Performance Cylinder Heads.

In the Box: 2 spark plugs