PLUGS SOLD IN SINGLES

APPLICATION LIST HERE

HKS SUPER FIRE RACING (M SERIES) PLUG TYPE HERE

Improved ignition performance, durability and anticarbon build-up. The Ultimate sparkplug for increasing performance of tuned or stock engines. 

0.6mm Iridium Alloy Center Electrode 
Iridium Alloy Center Electrode reduces voltage requirement as well as improving ignition performance and durability. 
Outer Electrode with Platinum Chip 
The Outer Electrode incorporates a square platinum chip which improves urability, and when combined with the iridium center electrode boosts ignition performance. 
The Outer Electrode features a shortened tip design and tapered shape while 
maintaining the necessary space for proper ignition. 
Short Type Outer Electrode (Anti-Vibration) 
The outer electrode has been shortened and engineered with the ideal shape to decrease weight for resistance against vibration. This anti-vibration design improves longevity of the outer electrode. 
Thermal Edge 
After long idling or various combustion conditions carbon buildup can occur causing misfires. The Thermal Edge of the ceramic insulator will discharge to help decrease carbon deposits. 
Spark Support Gap 
Discharges will occur in the Spark Support Gap (space between the tip of insulator and the base of the outer electrode) to help prevent carbon buildup. 

Performance and Efficiency 

Increased Ignition Performance 
Decreased voltage requirement strengthens ignition performance under harsh conditions like lean mixture or high boost pressure. 

M35I  heat range NGK7

M Series is recommended for reliable ignition, durability and anti-carbon buildup under high load. 

Heat Range Conversion Chart 

HKS          25    30    35    40    45    50    52.5    55 
DENSO    16    20    22    24    27    31     32        34 

NGK            5    6      7      8      9    10     10.5     11

SUIT MODELS 

TOYOTA CELICA ST18. to ST20. inc Turbo

HONDA S2000 AP1 AP2

DC2 B18C INTEGRA TYPE R

LEGNUM VR4 EC5W 6A13 TURBO

MAZDA MX5 1989 - 2005 , NA6,NB6,NA8,NB8

NISSAN SILVIA 180SX 200SX S13 S14 S15  SR20DET

FORESTER 1996-2007 SF5 SG5 SF9 Inc Turbo

SUBARU LEGACY 1989 - 2003 BC,BD,BH,BE EJ20T EJ20TT n/a & Turbo

SUBARU IMPREZA STI GDB 2000 - 2006 EJ20T

SUBARU IMPREZA WRX GDA 2000 - 2006 EJ20T & WRX GC8 Inc STi 1992 -00

TOYOTA MR2 SW20 Inc Turbo
TOYOTA MRS SPYDER 1999-2007
TOYOTA ARISTO JZS147 JZS161 3L 2JZ
TOYOTA ALTEZZA 3SGE 1G-FE
TOYOTA CALDINA ST215 ST246 3S-GTE 3S-GE
TOYOTA COROLLA AE100 AE101 AE111 4A-FE 4A-GE
TOYOTA CROWN JZS151 JZS171  1JZ
TOYOTA SUPRA JZA80 2JZ-GE 2JZ-GTE
TOYOTA STARLET EP82 EP91
TOYOTA CELICA ST205
TOYOTA CHASER / MARK II  JZX90 JZX100 1JZ 92-2000
TOYOTA BLADE AZE156H 2AZ-FE 2.4L 2006-2012
NISSAN SKYLINE R33 R34 RB25DE RB25DET
NISSAN PULSAR GTIR SR20DET
NISSAN FAIRLADY Z32 VG30 1989-2000
HONDA CR-Z ZF1 ZF2 2010- 
HONDA ACCORD CL7 CL9 K20 K24 2003-2007
HONDA INTEGRA DC5 TYPE R K20
HONDA CIVIC FD2 TYPE R 2005-2012
SUZUKI SWIFT SPORT ZC31S 2005-2010 1.6L