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USA
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- USA
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Ships within 48 hours · Estimated delivery Jul 12 - Jul 17
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For Your Every Summer RSVP, with Code: SUMMER15
Description
HKS Super Fire Racing Spark Plug 50003-M40GM 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: 20.8mm
Fits:
| 1985 - 1989 | HONDA | ACCORD | L4 | 1.8 | ALL | From 6/1985 Thru 9/1989 Production Date | CA1 Chassis | Stock Plug/Heat Range: LONG:5 | |
| 1987 - 1989 | HONDA | ACCORD | L4 | 2.0 | ALL | From 5/1987 Thru 9/1989 Production Date | CA5 Chassis | Stock Plug/Heat Range: LONG:5 | |
| 1988 - 1989 | HONDA | ACCORD | ALL | 2.0 | A20A3 | From 4/1988 Thru 9/1989 Production Date | CA6 Chassis | Stock Plug/Heat Range: LONG:5 | |
| 1982 - 1987 | HONDA | PRELUDE | L4 | 1.8 | ALL | From 11/1982 Thru 4/1987 Production Date | AB83 Chassis | Stock Plug/Heat Range: LONG:6 | |
| 1983 - 1987 | MAZDA | 626 | L4 | 2.0 | ALL | From 10/1983 Thru 2/1987 Production Date | GCEP Chassis | Stock Plug/Heat Range: LONG:6 | |
| 1993 - 1997 | MITSUBISHI | DIAMANTE | ALL | 3.0 | 6G72 | From 1/1993 Thru 1/1997 Production Date | K45 Chassis | Wagon SOHC | Stock Plug/Heat Range: LONG:6 |
| 1990 - 1995 | MITSUBISHI | ECLIPSE | ALL | 2.0 | 4G63 | From 2/1990 Thru 6/1995 Production Date | D22A Chassis | DOHC | Stock Plug/Heat Range: LONG:6 |
| 1990 - 1995 | MITSUBISHI | ECLIPSE | ALL | 2.0 | 4G63 | From 2/1990 Thru 6/1995 Production Date | D27A Chassis | Stock Plug/Heat Range: LONG:6 | |
| 1995 - 1999 | MITSUBISHI | ECLIPSE | ALL | 2.0 | 4G63 | From 6/1995 Thru 8/1999 Production Date | D32A Chassis | Stock Plug/Heat Range: LONG:6 | |
| 1997 - 1999 | MITSUBISHI | ECLIPSE | ALL | 2.0 | 4G63 | From 3/1997 Thru 8/1999 Production Date | D38A Chassis | Stock Plug/Heat Range: LONG:6 | |
| 1992 - 1992 | MITSUBISHI | LANCER | ALL | 2.0 | 4G63 | From 10/1991 Thru 1/1994 Production Date | CD9A Chassis | DOHC | Stock Plug/Heat Range: LONG:7 |
| 1993 - 1994 | MITSUBISHI | LANCER | ALL | 2.0 | 4G63 | From 1/1994 Thru 9/1994 Production Date | CE9A Chassis | DOHC | Stock Plug/Heat Range: LONG:7 |
| 1995 - 1995 | MITSUBISHI | LANCER | ALL | 2.0 | 4G63 | From 9/1994 Thru 8/1996 Production Date | CE9A Chassis | DOHC | Stock Plug/Heat Range: LONG:7 |
| 1996 - 1996 | MITSUBISHI | LANCER | ALL | 2.0 | 4G63 | From 8/1996 Thru 12/1997 Production Date | CN9A Chassis | DOHC | Stock Plug/Heat Range: LONG:7 |
| 2003 - 2005 | MITSUBISHI | LANCER | ALL | 2.0 | 4G63 | From 2/2004 Thru 2/2005 Production Date | CT9A Chassis | DOHC | Stock Plug/Heat Range: LONG:7 |
| 1997 - 1998 | MITSUBISHI | LANCER | ALL | 2.0 | 4G63 | From 1/1998 Thru 12/1998 Production Date | CP9A Chassis | DOHC | Stock Plug/Heat Range: LONG:7 |
| 1999 - 2000 | MITSUBISHI | LANCER | ALL | 2.0 | 4G63 | From 1/1999 Thru 1/2001 Production Date | CP9A Chassis | DOHC | Stock Plug/Heat Range: LONG:7 |
| 1999 - 2000 | MITSUBISHI | LANCER | ALL | 2.0 | 4G63 | From 1/2000 Thru 1/2001 Production Date | CP9A Chassis | Tommi Makinen Edition DOHC | Stock Plug/Heat Range: LONG:7 |
| 2001 - 2002 | MITSUBISHI | LANCER | ALL | 2.0 | 4G63 | From 2/2001 Thru 3/2002 Production Date | CT9A Chassis | DOHC | Stock Plug/Heat Range: LONG:7 |
| 2003 - 2005 | MITSUBISHI | LANCER | ALL | 2.0 | 4G63 | From 2/2003 Thru 1/2004 Production Date | CT9A Chassis | DOHC | Stock Plug/Heat Range: LONG:7 |
| 1988 - 1991 | MITSUBISHI | MONTERO | V6 | 3.0 | ALL | From 9/1988 Thru 1/1991 Production Date | L141/146GW Chassis | Stock Plug/Heat Range: LONG:5 | |
| 1988 - 1990 | MITSUBISHI | STARION | ALL | 2.6 | ALL | From 5/1988 Thru 10/1990 Production Date | A187A Chassis | Stock Plug/Heat Range: LONG:7 | |
| 1985 - 1988 | SUBARU | JUSTY | L3 | 1.2 | ALL | From 10/1985 Thru 10/1988 Production Date | KA7/KA8 Chassis | Stock Plug/Heat Range: LONG:6 | |
| 1988 - 1994 | SUBARU | JUSTY | L3 | 1.2 | ALL | From 11/1988 Thru 3/1994 Production Date | KA7/KA8 Chassis | Stock Plug/Heat Range: LONG:6 | |
| 1983 - 1986 | TOYOTA | CELICA | L6 | 2.8 | 5MGE | From 8/1983 Thru 2/1986 Production Date | MA61 Chassis | Stock Plug/Heat Range: LONG:5 | |
| 1988 - 1992 | TOYOTA | LAND CRUISER | ALL | 4.0 | 3FE | From 8/1988 Thru 8/1992 Production Date | FJ62G/FJ80G Chassis | Stock Plug/Heat Range: LONG:5 | |
| 1987 - 1990 | TOYOTA | TERCEL | ALL | 1.5 | 3E;3EE | From 5/1986 Thru 9/1990 Production Date | EL31 Chassis | Stock Plug/Heat Range: LONG:5 | |
| 1989 - 1992 | VOLKSWAGEN | GOLF | ALL | 1.8 | RV | From 10/1989 Thru 3/1992 Production Date | E-19RV Chassis | Stock Plug/Heat Range: LONG:6 | |
| 1989 - 1992 | VOLKSWAGEN | JETTA | ALL | 1.8 | ALL | From 10/1989 Thru 11/1991 Production Date | E-16RV Chassis | Stock Plug/Heat Range: LONG:6 |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
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
4.6 ★★★★★
Based on 725 reviews
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Product Reviews
★★★★★ 5
They worked out great!!!
Color: D) 4-Pack 3" Balls (Yellow), Color: D) 4-Pack 3" Balls (Yellow)
So far have been the solution we were looking for! I was extremely tired of the non stop destruction and order of large Chuckit balls for our high energy/high drive dog. For about the same price I bought four 3 inch balls to test out their durability and fit for the thrower. THEY WORK! Perfection! They even make a fun whistling sound as they sail through the air. They do require a tad more muscle in the thrower but that is not a problem. They have already shown to be WAY more durable. The 3 inch balls work in the large chunkit thrower. Super find.
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Reviewed in the United States on April 9, 2026
★★★★★ 4
Durable
Color: E) 8-Pack 2.5" Balls (Yellow)
My dogs love them. They are very bouncy, and ideal size, and durable. Great alternative to a tennis ball which in my house only last 30 minutes.
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Reviewed in the United States on March 23, 2026
★★★★★ 5
Toughest dang balls I ever played with
Color: D) 4-Pack 3" Balls (Yellow), Color: D) 4-Pack 3" Balls (Yellow)
These things are amazing. We have a ball obsessed Husky mix and he has destroyed Kongs, Chuck Its, and a whole lot of other ball shaped objects. These things? We bought the 4 pack because we bought 4 Chuck Its and they lasted a year, all 4 of them only a year, before they were destroyed. A year after buying these? We only bought more because he lost 3 of them. I think we did find one under the dresser after buying this pack... But the others? They either ended up thrown over the fence into the woods or lost in the holes in the yard the monster digs up. Other than a few pockmarks from his teeth and maybe some mud, they may as well be brand new even after a year or two. Probably the most chew resistant thing we've ever bought him. They're really solid rubber and since he hasn't managed to bite into them to take out a chunk, they're safe as hell. Being as big as they are, I don't worry he's gonna choke unattended on them like the usual size of ball. About the only concern is forcing breaks so he can have breathing moments when he manages to talk us into fetch outside. It fits in the larger Chuck It thrower too, so we haven't lost any value from having those torn up.
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Reviewed in the United States on April 26, 2026
★★★★★ 5
Sturdy bouncy fun!
Color: D) 4-Pack 3" Balls (Yellow), Color: D) 4-Pack 3" Balls (Yellow)
Great product. My big 70lb Sheppard puppy loves it, hasn’t stopped playing with it since it arrived. She throws it about and chases it, had a good chew on it and even put it in her favorite toys bin. Sturdy, firm and very bouncy. And there are 3 more in the bag for an awesome price. Bright color will make it easy to find and holes thru it will prevent choking and I can string it on a line for training play.
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Reviewed in the United States on November 28, 2025
★★★★★ 5
Dogs love these
Color: C) 2-Pack 2.5" Balls (Yellow)
Great quality balls for tough chewers. I love them, but wish the orange ones were available more...I've been checking cuz they are easier to find in the yard than the green that blends in. Our dogs love them and I like the weight for throwing.
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Reviewed in the United States on May 9, 2026