B4x Spark Plug Information
Comprehensive spark plug specifications and recommendations for B4x Gen 1, B4xTU, and B48E engines.
B4x Owners Attention! The OEM Coils output some of the highest amounts of energy observed in the industry. There is no need to gap the plugs at all unless you are running extremely high power levels and your tuner has advised you to gap the plug.
B4x Gen 1 Spark Plugs
| Plug Model | Heat Range | Protection | Position | Material | Gap |
|---|---|---|---|---|---|
| NGK 94201 | 8 | Standard | 0 | Iridium | 0.75mm / 0.030" |
| NGK 93560 | 9 | Improved | -1.5mm / -0.059" (Sits further from piston) | Iridium | 0.7mm / 0.028" |
| BRISK 2MOER12YS | 8 | Improved | -1.15mm / -0.045" (Sits further from piston) | Silver | 0.5mm / 0.020" |
| BRISK 2MOER10S | 9 | Enhanced | -2mm / -0.079" (Sits further from piston) | Silver | 0.4mm / 0.016" |
B4xTU Spark Plugs
| Plug Model | Heat Range | Protection | Position | Material | Gap |
|---|---|---|---|---|---|
| NGK 95248 | 8 | Standard | 0 | Iridium | 0.75mm / 0.030" |
| NGK 96206 | 8 | Standard | 0 | Iridium | 0.8mm / 0.031" |
| NGK SILZKGR8G8SLatest - Replaces 96206 & 95248. Currently Only Available From BMW | 8 | Enhanced | 0 | Iridium | 0.75mm / 0.030" |
| NGK 93560 | 9 | Improved | -1.85mm / -0.073" (Sits further from piston) | Iridium | 0.7mm / 0.028" |
| BRISK 2MOER12YS | 8 | Improved | -1.5mm / -0.059" (Sits further from piston) | Silver | 0.5mm / 0.020" |
| BRISK 2MOER10S | 9 | Enhanced | -2.35mm / -0.093" (Sits further from piston) | Silver | 0.4mm / 0.016" |
B48E Spark Plugs
| Plug Model | Heat Range | Protection | Position | Material | Gap |
|---|---|---|---|---|---|
| NGK 95248 | 8 | Standard | 0 | Iridium | 0.75mm / 0.030" |
| NGK 96206 | 8 | Standard | 0 | Iridium | 0.8mm / 0.031" |
| NGK SILZKGR8G8SLatest - Replaces 96206 & 95248. Currently Only Available From BMW | 8 | Enhanced | 0 | Iridium | 0.75mm / 0.030" |
| NGK 93560 | 9 | Improved | -1.85mm / -0.073" (Sits further from piston) | Iridium | 0.7mm / 0.028" |
| BRISK 2MOER12YS | 8 | Improved | -1.5mm / -0.059" (Sits further from piston) | Silver | 0.5mm / 0.020" |
| BRISK 2MOER10S | 9 | Enhanced | -2.35mm / -0.093" (Sits further from piston) | Silver | 0.4mm / 0.016" |
Pre-Ignition / Detonation Protection Explained
Standard
What was considered standard from the OEM. However, this is still an improvement over the N2x NGK 97506 Plug Design.
Improved
The metal shell has been extended to cover/shield more of the electrode (positive firing end) ceramic, but does not shield/protect all of the ceramic.
Enhanced
The metal shell extension completely covers/shields the electrode's ceramic and provides the most pre-ignition or detonation protection.
Why Projection Type Matters
Projection is how far from the body/shell of the plug the ground strap and electrode extend. The longer or further away from the plug body they are, the better spark efficiency — but the greater risk of plug failure or potential engine damage from a hot ground strap causing pre-ignition.
How Much Boost Can These Plugs Handle?
Plug life can vary depending on the application. Things that can reduce plug life:
- •Gapping Plugs: Can reduce life as precious metals on the electrode and ground strap wear out quicker.
- •Incorrect Heat Range: Running high boost pressures or high octane fuels can lead to premature failure or reduced service life.
- •Detonation / Pre-Ignition: Can cause the ceramic to prematurely crack and become dislodged, usually resulting in engine failure/piston damage.
Plug Recommendations
| Plug Model | Ideal Max Service Life | Max Boost |
|---|---|---|
| NGK 95248 | 25,000 KM (15,500 mi) @ 0.56mm/0.022" Gap | OEM Gap 50,000 KM (31,000 mi) | 30 PSI / 2.07 bar @ Sea Level |
| NGK 96206 | 25,000 KM (15,500 mi) @ 0.56mm/0.022" Gap | OEM Gap 50,000 KM (31,000 mi) | 30 PSI / 2.07 bar @ Sea Level |
| NGK SILZKGR8G8S | 25,000 KM (15,500 mi) @ 0.56mm/0.022" Gap | OEM Gap 50,000 KM (31,000 mi) | 30 PSI / 2.07 bar @ Sea Level |
| NGK 94201 | 25,000 KM (15,500 mi) @ 0.56mm/0.022" Gap | OEM Gap 50,000 KM (31,000 mi) | 30 PSI / 2.07 bar @ Sea Level |
| NGK 93560 | 25,000 KM (15,500 mi) @ 0.56mm/0.022" Gap | OEM Gap 50,000 KM (31,000 mi) | 40 PSI / 2.76 bar @ Sea Level |
| BRISK 2MOER12YS | OEM Gap 15,000 KM (9,300 mi) | 30 PSI / 2.07 bar @ Sea Level |
| BRISK 2MOER10S | OEM Gap 10,000 KM (6,200 mi) | 40 PSI / 2.76 bar @ Sea Level |