NGK V-Power Spark Plugs (3.8L) gmc allowing the muffler to be

allowing the muffler to be placed closer to heat sensitive areas

PCM unlock

Properly gapped spark plugs are critical for a well tuned car

which can safely reach a projected 400-415whp  to the ground

NGK V-Power Spark Plugs (3.8L) gmc allowing the muffler to beNGK V Power Spark Plugs (6 pack) NGK v power plugs have a copper core. Performance and improved ignitability over standard Spark Plugs. Original equipment manufacturer and racer approved. Copper core plugs are recommended for a 3. 8l supercharged and non supercharged vehicles Lowers ignition system voltage requirements Tried and true copper core design elements ideal for Supercharged engines V power conductor controls flame formation and propagation.