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IRIDIUM RACING Specifications – DENSO SPARK PLUG

Detailed Specs

ONE PC BOX
DENSO P/N :
2pcs BLISTER PACK
DENSO P/N :
DENSO ARC
SPARK PLUG
Precautions for Use DENSO Corporation

Warning: On choosing the right racing plug
  • Generally, electrodes that project into the combustion chamber have better ignitability and have better performance. However, because of more exposure to high temperature combustion gases and because ground electrode becomes longer, heat resistance and durability decrease. The higher the level of tuning, the greater the need is to use a less projecting type.
  • As the level of tuning is increased, so does the need for a higher heat range.

Identifying IRIDIUM RACING (Stamped into the Center of the Housing)

IW01ー27
↑↑↑↑↑
VarietyThread SizeIntermediate Number
（Overall Size）		Intermediate Number
（Electrode Shape）		Heat Range
I：IridiumU：10mm1：Slant ground electrode or surface gap plug.24
XU：12mm27
A：14mm29
R：Surface GapAE：14mm2：Flat ground electrode31
K：14mm32
KH：14mm6：Slant ground electrode and non-resistor plug34
Q：14mm35
RE：14mm
RL：14mm(Exception) IRE01 has a flat ground electrode.
RT：14mm
W：14mm
WM：14mm

IRIDIUM RACING Specifications

TYPEAPPLICATIONSPECDIA.
(mm)		REACH
(mm)		HEX
(mm)		GAP
(mm)		PROJECION
(mm)		SPARK
POSITION
(mm)		GROUND
ELECTRODE
HEIGHT
(mm)		TERMINAL
SHAPE		RESISTOR
(kΩ)		No.IRIDIUM RACING
ONE PC BOX
DENSO P/N
IK01-24AutomobileISO(SLANT ELEC.)1419160.7-1.00.52.0S5R01267700-1311
IK01-27AutomobileISO(SLANT ELEC.)1419160.7-1.00.52.0S5R02267700-1321
IK01-31AutomobileISOSLANT ELEC.1419160.7-1.00.52.0S5R03267700-1331
IK01-34AutomobileISO(SLANT ELEC.)1419160.7-1.00.52.0S5R42267700-1341
IK02-24AutomobileISO(STRAIGHT ELEC.)1419160.7-2.3-0.80.7S5R04267700-1361
IK02-27AutomobileISO(STRAIGHT ELEC.)1419160.7-2.3-0.80.7S5R05267700-1371
IK02-31AutomobileISO(STRAIGHT ELEC.)1419160.7-2.3-0.80.7S5R06267700-1381
IKH01-24AutomobileLONG REACH1426.5160.7-1.00.52.0S5R49267700-4451
IKH01-27AutomobileLONG REACH1426.5160.7-1.00.52.0S5R50267700-4461
IKH01-31AutomobileLONG REACH1426.5160.7-1.00.52.0S5R51267700-4471
IQ01-24AutomobileSLANT ELEC.1419160.7-1.00.52.0S5R07267700-1411
IQ01-27AutomobileSLANT ELEC.1419160.7-1.00.52.0S5R08267700-1421
IQ01-31AutomobileSLANT ELEC.1419160.7-1.00.52.0S5R09267700-1431
IQ01-34AutomobileSLANT ELEC.1419160.7-1.00.52.0S5R43267700-1441
IQ02-24AutomobileSTRAIGHT ELEC.1419160.7-2.3-0.80.7S5R10267700-1461
IQ02-27AutomobileSTRAIGHT ELEC.1419160.7-2.3-0.80.7S5R11267700-1471
IQ02-31AutomobileSTRAIGHT ELEC.1419160.7-2.3-0.80.7S5R12267700-1481
IW01-24MotorcycleW-E141920.60.6-1.50.01.6RC5R13267700-1111
IW01-27MotorcycleW-E141920.60.6-1.50.01.6RC5R14267700-1121
IW01-29Racing KartW-E141920.60.6-1.50.01.6RC5R15267700-1131
IW01-31Racing KartW-E141920.60.6-1.50.01.6RC5R16267700-1141
IW01-32Racing KartW-E141920.60.6-1.50.01.6RC5R17267700-1151
IW01-34Racing KartW-E141920.60.6-1.50.01.6RC5R18267700-1161
IW06-27AutomobileW-E NON RESISTOR141920.60.6-1.50.01.6S0R44067600-1811
IW06-31AutomobileW-E NON RESISTOR141920.60.6-1.50.01.6S0R45067600-1821
IW06-34AutomobileW-E NON RESISTOR141920.60.6-1.50.01.6S0R46067600-1831
IRE01-27Rotary EngineROTARY ENGINE1421.520.60.7-2.2-0.70.8RC5R19267700-1521
IRE01-31Rotary EngineROTARY ENGINE1421.520.60.7-2.2-0.70.8RC5R20267700-1531
IRE01-32Rotary EngineROTARY ENGINE1421.520.60.7-2.2-0.70.8RC5R21267700-1541
IRE01-34Rotary EngineROTARY ENGINE1421.520.60.7-2.2-0.70.8RC5R22267700-1551
IRE01-35Rotary EngineROTARY ENGINE1421.520.60.7-2.2-0.70.8RC5R41267700-1561
IRL01-27Rotary EngineROTARY RX8(LEADING)142120.61.1-2.5-0.51.6S5R54267700-4821
IRL01-31Rotary EngineROTARY RX8(LEADING)142120.61.1-2.5-0.51.6S5R55267700-4831
IRT01-31Rotary EngineROTARY RX8(TRAILING)141920.61.1-2.5-0.51.6S5R52267700-4841
IRT01-34Rotary EngineROTARY RX8(TRAILING)141920.61.1-2.5-0.51.6S5R53267700-4851
IA01-31MotorcycleWITH DETONATION COUNTER1422160.6-1.00.51.9S5R23267700-1261
IA01-32MotorcycleWITH DETONATION COUNTER1422160.6-1.00.51.9S5R24267700-1271
IA01-34MotorcycleWITH DETONATION COUNTER1422160.6-1.00.51.9S5R25267700-1281
IAE01-32MotorcycleW/OUT DETONATION COUNTER1419160.6-1.30.52.1S5R47267700-2941
IAE01-34MotorcycleW/OUT DETONATION COUNTER1419160.6-1.30.52.1S5R48267700-2951
IWM01-29MotorcycleW-EM141920.60.6-1.50.01.6S5R26267700-1211
IWM01-31MotorcycleW-EM141920.60.6-1.50.01.6S5R27267700-1221
IWM01-32MotorcycleW-EM141920.60.6-1.50.01.6S5R28267700-1231
IWM01-34MotorcycleW-EM141920.60.6-1.50.01.6S5R29267700-1241
IXU01-24MotorcycleXU-E1219160.6-1.50.01.4R5R30267700-1061
IXU01-27MotorcycleXU-E1219160.6-1.50.01.4R5R31267700-1071
IXU01-31MotorcycleXU-E1219160.6-1.50.01.4R5R32267700-1081
IXU01-34MotorcycleXU-E1219160.6-1.50.01.4R5R33267700-1091
IU01-24MotorcycleU-E1019160.6-1.8-0.31.2R5R34267700-1011
IU01-27MotorcycleU-E1019160.6-1.8-0.31.2R5R35267700-1021
IU01-31MotorcycleU-E1019160.6-1.8-0.31.2R5R36267700-1031
IU01-34MotorcycleU-E1019160.6-1.8-0.31.2R5R37267700-1041
*RU01-27MotorcycleU-E(SURFACE)1019161.1-0.20.00.0R5R38267700-1571
*RU01-31MotorcycleU-E(SURFACE)1019161.1-0.20.00.0R5R39267700-1581
*RU01-34MotorcycleU-E(SURFACE)1019161.1-0.20.00.0R5R40267700-1591
  • *These plugs do not have iridium electrodes.

<Spark gap example>
For a 1.1 mm gap, set from 1.0 to 1.1 mm.
<Insulator projection>
Length from edge of side housing to top of insulator. The plus (+) direction is the distance from the edge to the piston head.
<Spark position>
Length from edge of side housing to top of center electrode. The plus (+) direction is the distance from the edge to the piston head.
<Ground electrode height>
Length from edge of side housing to top of ground electrode. The plus (+) direction is the distance from the edge to the piston head.
<Terminal shapes>
S: solid terminal, R: removable, RC: crimped nut, T: threaded

Actual products may differ from images shown.