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Description
HKS Super Fire Racing Spark Plug 50003-M40M Series Super Fire Spark Plugs HKS M Series spark plugs are high performance Iridium plugs designed to provide improved ignition performance, durability and anti carbon build up. 0. 6mm Iridium Alloy Center Electrode Outer Electrode with Platinum Chip Short Type Outer Electrode (Anti Vibration) Thermal Edge Spark Support Gap M Series is recommended for reliable ignition, durability and anti carbon buildup under high load. The Iridium alloy is used
M-Series Super Fire Spark Plugs
HKS M-Series spark plugs are high performance Iridium plugs designed to provide improved ignition performance, durability and anti-carbon build-up.
- 0.6mm Iridium Alloy Center Electrode
- Outer Electrode with Platinum Chip
- Short Type Outer Electrode (Anti-Vibration)
- Thermal Edge
- Spark Support Gap
M Series is recommended for reliable ignition, durability and anti-carbon buildup under high load.
The Iridium alloy is used because of its durability and reliability. On an average plug, a narrow core typically shortens life span of plug but with the intense durability of iridium there is no sacrifice in any longevity. With a high melting point of 2454 degrees C, opposed to the 1769 degrees C of white gold, the electrode can tolerate the high levels of compression and minor knocking without any deterioration. A nickel coating on the housing also prevents the spark plug from premature deterioration. The Iridium plugs are available for multiple applications and offered in "colder" heat ranges of 7 and up and specifically for rotary, heat ranges of 9 and up are offered.
Heat Range: NGK # 8
Thread Size: 14mm × 19mm
Wrench Size: 16mm
Fits:
| ACURA | INTEGRA | ALL | 1.8 | B18A1 | 1991 - 1993 | DB1 Chassis | DOHC | Stock Plug/Heat Range: JIS:6 | From 10/1991 Thru 4/1993 Production Date |
| ACURA | LEGEND | V6 | 2.5 | C25A1 | 1985 - 1987 | KA2 Chassis | Stock Plug/Heat Range: JIS:6 | From 10/1985 Thru 2/1987 Production Date | |
| ACURA | LEGEND | V6 | 2.7 | C27A1 | 1987 - 1990 | KA3/KA6 Chassis | Stock Plug/Heat Range: JIS:6 | From 2/1987 Thru 9/1990 Production Date | |
| HONDA | CIVIC | L4 | 1.5 | D15B2 | 1987 - 1989 | EF2/EF4 Chassis | Stock Plug/Heat Range: JIS:6 | From 9/1987 Thru 9/1989 Production Date | |
| HONDA | CIVIC | L4 | 1.5 | D15B2 | 1989 - 1991 | EF2/EF4 Chassis | Stock Plug/Heat Range: JIS:6 | From 10/1989 Thru 8/1991 Production Date | |
| HONDA | CIVIC | L4 | 1.5 | D15B7 | 1992 - 1996 | EY4 Chassis | Stock Plug/Heat Range: JIS:6 | From 10/1992 Thru 2/1996 Production Date | |
| HONDA | CRX | L4 | 1.5 | D15B2 | 1987 - 1989 | EF6 Chassis | Stock Plug/Heat Range: JIS:6 | From 9/1987 Thru 9/1989 Production Date | |
| HONDA | CRX | L4 | 1.5 | D15B2 | 1989 - 1991 | EF6 Chassis | Stock Plug/Heat Range: JIS:6 | From 9/1989 Thru 2/1992 Production Date | |
| HONDA | PRELUDE | L4 | 2.0 | B20A5 | 1985 - 1991 | BA1/BA4/BA5 Chassis | DOHC | Stock Plug/Heat Range: JIS:6 | From 10/1985 Thru 9/1991 Production Date |
| HONDA | PRELUDE | L4 | 2.0 | B20A5 | 1987 - 1991 | BA4/BA5 Chassis | Stock Plug/Heat Range: JIS:5 | From 4/1987 Thru 9/1991 Production Date | |
| HONDA | PRELUDE | L4 | 2.0 | B20A5 | 1989 - 1991 | BA5 Chassis | DOHC TCS | Stock Plug/Heat Range: JIS:6 | From 11/1989 Thru 9/1991 Production Date |
| LEXUS | ES300 | ALL | 3.0 | 3VZFE | 1992 - 1996 | VCV10 Chassis | Stock Plug/Heat Range: JIS:6 | From 10/1991 Thru 8/1996 Production Date | |
| MAZDA | 626 | L4 | 2.0 | ALL | 1987 - 1989 | GDER/GDEA/GDEP/GDEB/GDES Chassis | DOHC | Stock Plug/Heat Range: JIS:6 | From 5/1987 Thru 5/1989 Production Date |
| NISSAN | 180SX | ALL | 1.8 | CA18DET | 1989 - 1991 | RS13/KRS13 Chassis | Stock Plug/Heat Range: JIS:6 | From 4/1989 Thru 1/1991 Production Date | |
| NISSAN | 300ZX | V6 | 3.0 | VG30T | 1984 - 1989 | HZ31/HGZ31 Chassis | Stock Plug/Heat Range: JIS:6 | From 9/1983 Thru 6/1989 Production Date | |
| NISSAN | PULSAR NX | ALL | 1.6 | CA16DE | 1987 - 1987 | EB12 Chassis | Stock Plug/Heat Range: JIS:6 | From 8/1986 Thru 1/1990 Production Date | |
| NISSAN | SKYLINE | ALL | 2.0 | RB20DE | 1989 - 1991 | HR32/HCR32/HNR32 Chassis | Stock Plug/Heat Range: JIS:5 | From 5/1989 Thru 8/1991 Production Date | |
| NISSAN | SKYLINE | ALL | 2.0 | RB20DET | 1989 - 1991 | HCR32/HNR32 Chassis | Stock Plug/Heat Range: JIS:5 | From 5/1989 Thru 8/1991 Production Date | |
| NISSAN | SKYLINE | ALL | 2.5 | RB25DE | 1991 - 1993 | ECR32/ER32 Chassis | Stock Plug/Heat Range: JIS:5 | From 8/1991 Thru 8/1993 Production Date | |
| NISSAN | SKYLINE | ALL | 2.6 | RB26DETT | 1989 - 1994 | BNR32 Chassis | Stock Plug/Heat Range: JIS:6 | From 8/1989 Thru 1/1995 Production Date | |
| NISSAN | SKYLINE | ALL | 2.6 | RB26DETT | 1995 - 1998 | BCNR33 Chassis | Stock Plug/Heat Range: JIS:6 | From 1/1995 Thru 1/1999 Production Date | |
| NISSAN | SKYLINE | ALL | 2.6 | RB26DETT | 1999 - 2002 | BNR34 Chassis | Stock Plug/Heat Range: JIS:6 | From 1/1999 Thru 8/2002 Production Date | |
| TOYOTA | CELICA | ALL | 2.0 | 3SFE | 1987 - 1989 | ST162 Chassis | Stock Plug/Heat Range: JIS:5 | From 8/1987 Thru 8/1989 Production Date | |
| TOYOTA | CELICA | ALL | 2.0 | 3SGELC | 1987 - 1989 | ST162 Chassis | Stock Plug/Heat Range: JIS:5 | From 8/1985 Thru 8/1989 Production Date | |
| TOYOTA | CELICA | ALL | 2.0 | 3SGTE | 1988 - 1989 | ST165 Chassis | Stock Plug/Heat Range: JIS:5 | From 10/1986 Thru 8/1989 Production Date | |
| TOYOTA | COROLLA | ALL | 1.6 | 4AFE | 1988 - 1992 | AE95 Chassis | Stock Plug/Heat Range: JIS:5 | From 5/1988 Thru 5/1992 Production Date | |
| TOYOTA | COROLLA | ALL | 1.6 | ALL | 1985 - 1987 | AE86 Chassis | Stock Plug/Heat Range: JIS:5 | From 6/1983 Thru 5/1987 Production Date | |
| TOYOTA |
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4.7 ★★★★★
Based on 20 reviews
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Product Reviews
★★★★★ 5
😍😍 BEST DEBUT NOVEL EVER
Format: Paperback
I’m having trouble finding accurate words to describe the way this book made me feel, but I am going to do my best.
To start off with basic elements, the character and world building are phenomenal. I feel a strong bond to not only the two main characters, Ara and Rogue, but to each and every character introduced throughout the book. The author did a stellar job of giving each of them unique personhood. All of the scenes are beautifully described. So much so that throughout the entirety of the book, I could see every scene: the towns, the castles, the meadows, the landscape. I have had difficulty with this and with distinguishing between outlying characters while reading in the past, but I did not have to think to remember details of world or character building because they flowed naturally within the story and were described well. I have read book series before that made me want to be a part of that world, but I actually felt like I got to step into Auryna and Ravaryn!
The plot twists!! Although this is not a suspense novel, it still had me on a rollercoaster of emotions and on the edge of my seat from beginning to end. I haven’t cried actual tears over a book since I was in high school (and I’ve read a LOT). This book finally broke the floodgates in the final few chapters. Multiple times. And we love a good cliffhanger. It truly made me FEEL.
THE SPICE is a solid 3.5/5. Some of the scenes had me flushed, some had me taking notes, some just had my jaw slack and my mouth hanging open. Bravo, JD Linton, bravo.
The relationships: friendships, family, romantic, ALL of the relationships in this book have so much meaning. The author does a great job at making you feel the love, the anger, the peace, the frustrations, the safety, the familiarity, etc. between the characters.
Ara and Rogue. I can not say enough and I also do not want to say too much. Just know that I feel like I know them both, to their core. I know what their childhood looks likes, their darkest moments, their biggest fears, their dreams and passions, what they want in life… The POV switches were seamless. I am so happy this author decided to let us see from both sets of eyes.
I can not wait for book two after that cliffhanger. And there is SO much potential for at least one prequel, I can’t wait to see where this author goes! I hope this series continues and flourishes. Fingers crossed!
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Reviewed in the United States on December 5, 2022
★★★★★ 5
Amazing!
Format: Kindle, Format: Kindle
This book was phenomenal, I devoured it within a few days! For this being a debut novel, it is fantastic and I would’ve thought the author was a seasoned author. I have zero complaints about this book.
Let me start by saying that the world building was phenomenal. I could picture everything in my head because of how detailed it was — that’s how good it was written. And I absolutely love the “captive/captor” trope so much, it’s become one of my favorite tropes, so I was pleasantly surprised to see that this book had that.
I loved the banter between Rogue and Ara — they’re both snarky and witty, plus with the romantic tension, it made the dialogue that much better. Speaking of romantic tension, yes there is spice but not so much of it that it overrides the plot, which I loved. For me, this would probably be on the 3/5 level of spice.
This book had a ton of plot twists and I thoroughly enjoyed it.
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Reviewed in the United States on November 13, 2024
★★★★★ 4
High on Tropes and Satisfaction
Format: Kindle
This is a great Romantasy book full of action, adventure, and everything you look for in this genre.
I won’t lie: it does kinda feel like the author found every common trope from every successful book of this kind and threw them all into this novel. But if it ain’t broke, don’t fix it. Especially in romance, there’s a large audience who has specific expectations, and they want them every time. Nothing wrong with that and many times I’m one of them.
I have no idea what defines a spoiler honestly, so
spoiler alert!!!!!!!
Tropes include:
Only one bed at the inn/bar
Dissatisfaction with life before hunk appears
Lost royalty
The chosen one
Montage of dress up time followed by shocked hunk
Forbidden romance between two from rival peoples
Power that cannot be controlled, simply guided/asked
Gathering intel at the inn/bar
FMC who knows how to fight/use weapons well
There’s probably more but no need to list them all.
Good story and I would recommend!
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Reviewed in the United States on June 14, 2024
★★★★★ 5
ABSOLUTELY A MUST for Omegaverse Girls!!!
I ABSOLUTELY LOVE Jillian West and her books!!! I’m so happy I already bought book two and now I have to buy the others for the Assurance Security series!!
Not gonna lie Val kind of annoyed me at the beginning but she grew on me!! Her men are chef’s kisses!!! Holt annoys me some but I can let it slide. I already bought part two so I’m going to be reading that in between work phone calls!!!! DON’T TELL MY BOSS 😂😂😂😂
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Reviewed in the United States on September 30, 2025
★★★★★ 4
Baby bumps and bodyguards
Format: Kindle
Dark, emotional, and unexpectedly tender, Not Ready is an omegaverse romance that delivers found family feels, fierce protectiveness, and a very pregnant heroine who refuses to break. Vale’s on the run from a stalker, but lands in the arms of three private security alphas, cue the swoony tension, fake marriage twist, and slow-burn heat.
It’s a little gritty, a little soft, and a whole lot addictive. If you love protective alphas, high stakes, and heroines with quiet strength, this one’s a must-read.
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Reviewed in the United States on December 18, 2025