Denso U-Groove Traditional Spark Plugs Stock Heat Range 3381 Subaru WRX 2006-2014 / STI 2004+

Description

This innovative Denso 3381 Spark Plug comes equipped with Densos patented U-shaped ground electrode. The U-Groove forms a channel for the spark nucleus to form at the instant of ignition, which generates a more potent spark.

More importantly during regular service intervals it is wise to check your spark plugs for wear, because new spark plugs will ensure for a healthy running engine, increased fuel economy, and better response. These are the factory heat range spark plugs for your vehicle and should be a direct fitment.

Sold in a set of 4.