NGK is the brand leader in the UK spark plug market and are the world's biggest supplier to many major car manufacturers. Each and every one of their products are designed to meet the most rigorous standards and are the professionals' choice because of their quality and technical excellence. Their plugs can be found in use by teams in F1, WRC and MotoGP. Put simply, NGK genuine spark plugs are the workhorse at the heart of smooth-running engines around the world. The ceramic insulation for the ground electrode on the 97506 is 5mm wide inside the steel shaft, versus 3.8mm for the 95770.

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 . All spark plugs remove some heat from the plug tip and transfer that heat to the engine cylinder head. Colder spark plugs are faster and more efficient at transferring heat away from the spark plug tip. Basically when you hear cold plug it means the spark plug transfers heat away from the tip rapidly. Hot plugs are slower at transferring the heat, which means the firing tip remains hotter. There’s overlap in these numbers for good reason. Boost pressures, fuel type, and other factors can affect these numbers. Some N54 engines may be happy with a 0.022″ gap even at 700whp. Others may need a 0.018″ gap before 600whp. The above guidelines are a good starting point, though. 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.unlike the 95770 washer that deforms, the solid copper crush washer doesn't function by geometrically deforming once. 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. 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

These plugs are suggested for most turbo BMW motors including the N20, N54, N55, S55, N63, N63TU, S63, and S63TU applications. Note BMW B58 uses a different NGK part found here. NGK is the brand leader in the UK spark plug market and are the world’s biggest supplier to many major car manufacturers. Each and every one of their products are designed to meet the most rigorous standards and are the professionals’ choice because of their quality and technical excellence. Their plugs can be found in use by teams in F1, WRC and MotoGP. Put simply, NGK genuine spark plugs are the workhorse at the heart of smooth-running engines around the world. The bottom of all the spark plugs all have some oil residue and carbon by the crush washer ring. Varying amounts up the threads. It took a wire brush to clean them up, including the crush washer face. Which spark plug is right for each person, engine, mods, tuning, etc can vary a lot. That’s why we put some larger and overlapping power levels above. It’s not like all OEM spark plugs are going to start having endless issues right at 375-400whp. Likewise, 2-step colder spark plugs are probably OK even at 400whp.Anyways, as with the other topics there are some general rules here. N54 spark plug replacement intervals are roughly:

The spark plug gap affects the voltage required to jump the gap and actually light the air-fuel mixture in the cylinder. A larger gap requires more voltage. Increasing gap size can actually lead to a more efficient burn since it increases the spark area. However, high cylinder pressures (compression ratio & boost) can blow out the spark if the gap is too large. 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. Please note – power numbers below are rough estimates of where we like each spark plug. For example, some run OEM N54 spark plugs above 400whp without issue while others like to run the NGK 2-step colder spark plugs even at 350-400whp. If your current spark plug setup has been working then there’s not much reason or benefit to changing things. However, if you’re planning to add more power then it is usually a good idea to start considering higher quality, colder spark plugs. Gapping spark plugs is another common topic for good reason. It’s important to have a good spark plug gap for many reasons. Too large a gap can cause misfire issues while too small a gap can reduce air-fuel burn efficiency. So, what is the right gap for N54 spark plugs? Let’s jump in and discuss the importance of spark plug gaps and recommendations for the 135i, 335i, and 535i.These plugs are suggested for most turbo BMW motors including the N20, N54, N55, S55, N63, N63TU, S63, and S63TU applications.

What’s your experience with N54 spark plugs & gapping? What do you run and what are your mods, boost, & power? Below we’ll list a few of the best spark plugs for the BMW N54 engine. Many of these are highly proven spark plugs. However, there are other good options that people have success with. As such, this isn’t an exhaustive list of all plugs for the N54 engine. These are simply products we recommend based on personal experience running these on our 2007 335i, 2008 135i, and 2008 535i.FFS you seriously need to do maybe 10 minutes of research before speaking on a subject. You continue to prove over and over again your "20 years" of experience is about as useful as zero years of experience.