NGK SILZKBR8D8S Laser Iridium Spark Plug (97506 Laser Iridium), 4 Pack

Product Information

For a B58 Engine with a Stage 1 or Stage 2 tune, you will need the Genuine BMW B58 High Power Stage 1/2 Spark Plugs Discussing spark plugs for the BMW N54 engine can be a lengthy topic. While spark plugs are a pretty simple part they’re extremely important, and there’s a lot that goes into the right setup. How often should you change spark plugs? What are colder plugs and when are they needed? What are the best spark plugs and gaps? None of these question have perfect answers, but there are some general guidelines. In this guide, we discuss some of the best N54 spark plugs, 1-step & 2-step colder, plug gapping, replacement intervals, and more. Pin Spark Plug Heat Ranges

I am boosting up as much as 21 – 22 PSI as I don’t care if the turbos go out because I am planning to go larger. I don't believe I should see any oil or carbon on the spark plug crush washer or head spark plug mating surface. This would seem to indicate that the plug washers are not sealed, correct?

JOIN OUR BLACK FRIDAY GIVEAWAY!

As you increase boost and power on the N54 you’re increasing cylinder combustion pressures. That leads to more heat than the N54 OEM Bosch spark plugs were designed to handle. In turn that may cause pre-ignition and spark plug overheating. Not good. However, going too cold can cause spark plugs to foul faster than normal. This is because colder plugs may remove too much heat and not successfully burn off deposits. I am running full intake/exhaust, including FMIC, and diverter valves and am catless. I am running a BMS WMI kit with dual nozzle BC 10 Chargepipe injection. While colder options may exist the 1-step and 2-step colder spark plugs are the most common choice on the N54. Among the two most popular are the NGK 97968 1-step colder and NGK 97506 2-step colder. These are generally good options even for 600-700+whp builds, which is why we don’t fully agree with the 75-100 horsepower rule.

These aren’t exhaustive lists, but a few common BMW spark plugs. Champion are OEM on many newer BMW engines. Bosch and NGK are also common OEM spark plugs for BMW. N54 1-Step & 2-Step Colder Spark Plugs Plug gap is relative to your ignition system. A tune is not going to be relevant to plug gap. If you're running iridium plugs DO NOT gap them, you'll break the electrode. If squashing your plug gap (below factory recommendations) improves your drivability then you have a failure in your ignition system and may want to look at new coils. This bulletin is notice of a “limited warranty extension.” This is NOT a notice of a Recall or Service Action. When installing the plugs with Precision Raceworks coils on the N55 engine, we recommend setting the gap down to 0.022"

Advanced search

Even then it’s best to run the factory gaps and adjust as necessary if you start noticing misfires or other issues. Some people instantly recommend gapping down to 0.022″, 0.020″ or 0.018″. We think it’s too aggressive for most, but there are some general guidelines. Here’s a rough breakdown: Often specified as original equipment, NGK Laser Iridium spark plugs are the best combination of performance and longevity. For a customer to request reimbursement for a “qualifying customer-pay repair” performed either by an authorized BMW center or independent repair shop located in the United States (including Puerto Rico), please have him/her submit his/her reimbursement request “online” at www.BMW-RP.com . There should be NO carbon or oil on the crush washer or the head seating area, yet I have it on multi-install 95770s all torque to spec. I would love someone to debate this as well.