NGK Iridum 1-Step Colder Spark Plugs - 06-14 WRX / 04-21 STI

Spark plugs

These are the only spark plugs to get for your sti. They do what their supposed to do!

NGK iridium 1 step- 15’ STI

So far so good! I notice that the car feels on point as far as more consistency with the power and tune. Thanks Nick for the help! -Anthony

Solid spark plugs

fairly priced, strong and reliable spark plugs