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Ships within 48 hours · Estimated delivery Jul 24 - Jul 29
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For Your Every Summer RSVP, with Code: SUMMER15
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 |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 10 reviews
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Product Reviews
★★★★★ 5
Finally a ball my power chewers cannot destroy
Size: Medium
I have two dogs, an American Bully and an American Pit Bull Terrier, and both of them love to chew. Most balls last a very short time around here before they are shredded or missing big chunks. This one has actually held up. They chase it, tug on it and sit and chew on it, and it is still in one piece with no pieces breaking off.
One of my favorite things is being able to put food inside. I add some kibble or small snacks, and they will happily sit and work on it for a long time. It keeps them busy, gives them something safe to chew, and they get a little reward while they play. When they are done, I just rinse it out and it is ready to go again.
If you have strong jawed dogs that usually destroy toys, this ball is worth trying. Mine really enjoy it and I feel better knowing they finally have a ball that can keep up with them.
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Reviewed in the United States on November 22, 2025
★★★★★ 5
My dog LOVES this ball
Size: Medium, Size: Medium
Does your dog destroy tennis balls in seconds?
Yes? Then your dog NEEDS this ball!
It's squishy like a tennis ball, fits in ball launchers (even the cheap ones) and bounces when it hits the ground.
My dog has been literally playing with this ball all day and not a single mark on it!
The only bad thing is that it does not float.
Definitely worth the money!
Put it in your cart!
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Reviewed in the United States on March 8, 2026
★★★★★ 5
Perfect for ball demolishers
Size: Medium
The dogs love the chuck it brand. I don’t know what it’s made of but they go crazy over them. Will not play with another ball. Wonder if it’s “laced” with an addictive scent. Have pits. Very durable. Not able to chew to pieces. Last for about 6 months before there is a small break. I keep a back up because when the ball goes missing the house is in chaos. 😆 🤪
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Reviewed in the United States on March 27, 2026
★★★★★ 5
Most durable ball!
Size: Medium
This are my dogs fav ball 😍 they last forever!
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Reviewed in the United States on April 23, 2026
★★★★★ 4
Chuckit medium rebound balls
Size: Medium
My 8 month old German shepherd dog loves these balls. They are easy to throw, they bounce great, they are very chewable! She keeps one in her mouth most of the time. It satisfies her need to chew and she does not chew other things. She drops it in the water and lets the hole fill up and drinks that way. The only problem that has caused is suction in her mouth and difficulty in dislodging it for her. However, she would be lost without it!
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Reviewed in the United States on April 19, 2023