NGK 94201 Spark Plug for BMW Gen 1 B48 & B58 engines Z4 (E89) We are so confident that

We are so confident that you'll agree we've achieved this

Gain up to 17+whp along with terrific sound

Additionally this harness adapts your OEM map sensor wire to a 3

the tuning complexity increases—Doc Vu’s approach reportedly improved boost consistency and drove down overshoot and timing corrections across revisions

NGK 94201 Spark Plug for BMW Gen 1 B48 & B58 engines Z4 (E89) We are so confident thatThese NGK 94201 Laser Iridium replacement plugs are specifically designed for the Gen1 BMW B48 B58 engine. Suggested for all factory and tuned applications, including those running E85, WMI, and or larger upgraded turbochargers. We suggest setting the gap down to 0. 022" using a BMS gapping tool. Beware of counterfeit NGK plugs being sold for $5 10 each on eBay and Amazon. They do not offer the same performance, lifespan, and knock resistance. NGK