NGK Spark Plug Specification Chart - Performance …

1 NGK Spark Plug Specification Chart56 NGK RacingNGK Spark Plugs8mm Spark Plugs3/4 Reach13mm HexR847-103176215 ACSurface DischargeR847-114653215 ACGasket, StudResistor10mm Spark Plugs1/2 ReachR0161-94156156 DR5/8 HexR0161-104778156 DRSemi-Surface DischargeR0161-115187156 DRGasket, LooseNon-Resistor3/4 Reach5/8 HexR0045J-95861286 ICSurface DischargeR0045J-107400286 ICGasket, SolidR0045J-117043286 ICNon-Resistor3/4 Reach5/8 HexR0045Q-104216286 ICSurface DischargeR0045Q-115957286 ICGasket, LooseResistor3/4 ReachR0373A-83407168 EB5/8 HexR0406A-81480168 EBFine Wire, IridiumR0373A-93388168 EBGasket, SolidR0406A-91481168 EBResistorR0373A-104940168 EBR0373A-115566168 EB3/4 Reach5/8 HexR0409B-87791253 ICFine WireR0409B-97792253 ICGasket, StudR0409B-105897253 ICResistor, Partial Reach14mm HexR0451B-89356 Fine Wire, IridiumGasket, SolidResistor12mm Spark Plugs3/4 Reach5/8 HexR2349-94418 Gasket, LooseR2349-106839 ResistorR2349-1145833/4 Reach5/8 HexR2525-94735128 ICPlatinumR2525-105281128 ICGasket, LooseR2525-115998128 Reach5/8 HexR2556B-81997 IridiumR2556B-96453 Gasket, SolidR2556B-104962 Resistor14mm Spark Plugs3/8 ReachR5670-5229835 DCXR53332214 DC13/16 HexR5670-6274635 DCProjectedR5670-7289135 DCV-PowerR5670-8335435 DCGasket, LooseR5670-9391335 DCNon-ResistorNGK RacingNGK Spark Plugs14mm Spark plugs (cont.)

2 460 ReachR5673-62405118 HQBR6FS4323129 CS5/8 HexR5673-72817118 HQV-PowerR5673-83249118 HQTapered, LooseR5673-93442118 HQNon-ResistorR5673-104050118 ReachR5674-64449255 HBUR6777347 HB5/8 HexR5674-75034255 HBV-PowerR5674-85657255 HBProjectedR5674-96468255 HBTapered, LooseR5674-106702255 HBNon-Resistor1/2 ReachR5525-7624124 T13/16 HexR5525-8738324 TGasket, SolidR5525-9391424 TNon-ResistorR5525-10209824 TR5525-11284424 T1/2 ReachR5530-8621724 BG13/16 HexR5530-9401624 BGGold PalladiumR5530-10636624 BGGasket, LooseR5530-11795824 ReachR5724-87317320 IZ5/8 HexR5724-97891320 IZProjectedR5724-107993320 IZTapered, LooseNon-Resistor3/4 ReachR5671A-74091212 IV5/8 HexR5671A-84554212 IVV-PowerR5671A-95238212 IVGasket, SolidR5671A-105820212 IVNon-ResistorR5671A-116596212 IV3/4 Reach5/8 HexR5672A-871733 LBKR8 EIX2668204 FOV-Power, ProjectedR5672A-974053 LBKR9 EIX2669204 FOGasket, SolidR5672A-1079423 LNon-Resistor3/4 ReachR7282-7458721 IC5/8 HexR7282-8471621 ICIridium, ShortR7282-9475321 ICGasket, SolidR7282-10200021 ICResistorR7282-105498521 ICR7282-11200121 IC3/4 Reach5/8 HexR5883-92780212 ACSurface DischargeR5883-116077212 ACGasket, SolidNon-Resistor3/4 Reach5/8 HexR6711-93167212 ACSemi-Surface DischargeR6711-102919212 ACGasket, SolidNon-Resistor3/4 ReachR6601-83033212 AC5/8 HexR6601-97885212 ACSemi-Surface DischargeR6601-104017212 ACGasket, SolidR6601-114586212 ACResistorSpark plug charts are sorted by thread size, thread reach, hex size.

3 Hotter plugs are listed above the colder plugs . Plug images are located on the opposite to the extreme modifications in racing applications, these Spark plugs are not warrantedNGK Spark Plug Specification Chart58 NGK RacingNGK Spark Plugs14mm Spark plugs (cont.)3/4 Reach5/8 HexR7434-84892162 DVIridiumR7434-94658162 DVISO, Low AngleGround ElectrodeR7434-104894162 DVGasket, SolidResistor3/4 Reach5/8 HexR7433-84889161 DUIridiumR7433-94660161 DUISO, ProjectedR7433-104891161 DUGasket, SolidResistor3/4 Reach5/8 HexR7435-84895163 DWIridium, JIS, ProjectedR7435-94896163 DWGasket, SolidR7435-104897163 DWResistor3/4 Reach5/8 HexR7436-84898164 DXIridiumR7436-94899164 DXJIS, Low Angle Ground ElectrodeR7436-104900164 DXGasket, SolidResistor3/4 ReachR6021E-755157158 BD13/16 HexR6021E-87466158 BDGasket, LooseR6021E-856351158 BDResistorR6021E-92401158 BDR6021E-954846158 BD3/4 Reach13/16 HexR6061-83363222 GCLow Angle Ground ElectrodeR6061-94074222 GCGasket.

4 SolidR6254E-95583108 ICNon-ResistorR6061-105962222 GCR6254E-1053949108 ICR6254K-1054076108 ICR6061-112773222 GC3/4 Reach13/16 HexR6252E-94741108 ICLow Angle Ground ElectrodeR6252E-1052396108 ICGasket, SolidR6252K-1052741108 ICResistor3/4 Reach13/16 HexR4304A-9215831 WGold Palladium, ProjectedR4304A-10218431 WGasket, LooseNon-Resistor3/4 Reach13/16 HexR7440B-10T5009171 EEIridiumR7440B-11T5495193 FBLow Angle Ground ElectrodeGasket, SolidResistorSpark plug charts are sorted by thread size, thread reach, hex size. Hotter plugs are listed above the colder plugs . Plug images are located on the opposite RacingNGK Spark Plugs14mm Spark plugs (cont.)3/4 ReachR5184-957485291 IC13/16 HexR5184-107457291 ICGold PalladiumR5184-1053334291 ICLow Angle Ground ElectrodeGasket, LooseNon-Resistor3/4 Reach13/16 HexR6179A-105P2697291 ICPlatinum, ShortR6179A-11P3698291 ICLow Angle Ground ElectrodeGasket, SolidResistor3/4 ReachB8 EGV562730 VB8ES2411317 IV13/16 HexR4118S-83236235 BDGold PalladiumB85 EGV749830 VGasket, LooseB9 EGV582730 VB9ES2611317 IVNon-ResistorR4118S-93245235 BDB95 EGV214530 VB10 EGV592730 VB10ES7928317 IVB10 EGP5224186 ESB105 EGV217130 VB11 EGV583130 V3/4 ReachR6918B-76259108 IC13/16 HexR6918B-84492108 ICPlatinumR6918B-92954108 ICLow Angle Ground ElectrodeR6918C-95196108 ICGasket.

5 SolidResistor3/4 ReachR7376-76991133 CW13/16 HexR7376-85442133 CWIridiumR7376-97763133 CWLow Angle Ground ElectrodeR7376-104457133 CWGasket, SolidResistor3/4 Reach13/16 HexB8EG343092 BSB8ES2411317 IVFine WireB9EG353092 BSB9ES2611317 IVGasket, LooseB10EG363092 BSB10ES7928317 IVNon-ResistorB11EG205592 BS3/4 Reach13/16 HexBR8EG3130105 BSBR8ES5422158 IVFine WireBR9EG3230105 BSBR9ES5722158 IVGasket, LooseBR10EG3830105 BSResistor3/4 ReachB8EG3997113 BSB8ES3683315 IV13/16 HexB9EG3998113 BSB9ES7148315 IVFine WireGasket, SolidNon-Resistor3/4 Reach13/16 HexBR8EG3992112 BSBR8ES3961147 IVFine WireBR9EG4015112 BSBR9ES3194147 IVGasket, SolidBR9EG-N-8268951 ANResistorBR10EG3993112 BSDue to the extreme modifications in racing applications, these Spark plugs are not warrantedNGK Spark Plug Specification Chart60 Spark plug charts are sorted by thread size, thread reach, hex size.

6 Hotter plugs are listed above the colder plugs . Plug images are located on the opposite RacingNGK Spark Plugs14mm Spark plugs (cont.)3/4 Reach13/16 HexR6712-95644186 ACSurface DischargeR6712-105421186 ACGasket, LooseResistor3/4 Reach13/16 HexR5649-94711186 ACSurface DischargeR5649-106498186 ACGasket, LooseR5649-114168186 ACNon-Resistor21mm ReachR7440A-9L3795102 CC13/16 HexR7420-96448 IridiumR7440A-10L4282102 CCLow Angle Ground ElectrodeR7420-105501 Gasket, ReachR6725-9625379 BG13/16 HexR6725-10334279 BGPlatinumR6725-105385779 BGLow Angle Ground ElectrodeR6725-11431179 BGGasket, SolidR6725-115448279 BGResistor22mm Reach5/8 HexR7282A-10392021 ICIridiumR7282A-105461421 ICLow AngleGround ElectrodeR7282A-11475421 ICShortGasket, Reach5/8 HexR7437-84901144 DIIridiumR7437-94654144 DIProjectedR7437-104655144 DIGasket.

7 Reach5/8 HexR7438-84905145 DJIridiumR7438-94656145 DJLow AngleGround ElectrodeR7438-104657145 DJGasket, SolidResistorDue to the extreme modifications in racing applications, these Spark plugs are not warrantedNGK RacingNGK Spark Plugs18mm Spark Plugs16mm HexR8102A-106813261 HHGasket, LooseNon-ResistorNGK Spark Plug Profile & Tip Images