The NGK BKR8EIX 2668 spark plug is our go-to iridium spark plug for JZ's and 7m's running E85. This plug works well as a replacement for both JZ's and 7m's. These plugs are 1 step colder than the NGK 4644's and work well for 600+ HP builds. Be careful of inferior, fake NGK spark plugs that look the same but don't perform the same! The price is for one spark plug so please order 6 when checking out!