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Ships within 48 hours · Estimated delivery Sep 19 - Sep 24
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Description
HKS Super Fire Racing Spark Plug 50003-M45XLM 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 # 9
Thread Size: 12mm × 26.5mm
Wrench Size: 14mm
Fits:
| 2014 - 2015 | ACURA | RLX | ALL | 3.5 | ELECTRIC/GAS | JNB1 | From 1/2015 Production Date | KC2 Chassis | HYBRID | Stock Plug/Heat Range: M12 Long Reach Hex16:7 |
| 2008 - 2012 | HONDA | ACCORD | L4 | 2.4 | ALL | K24Z2 | From 12/2008 Production Date | CU2 Chassis | i-VTEC | Stock Plug/Heat Range: M12 Long Reach Hex16:7 |
| 2008 - 2008 | MERCEDES-BENZ | C300 | ALL | 3.0 | ALL | ALL | From 6/2007 Production Date | DBA-204054 Chassis | Stock Plug/Heat Range: M12 Long Reach HEX16:7 | |
| 2007 - 2015 | MINI | COOPER | ALL | 1.6 | ALL | ALL | From 2/2007 Production Date | ABA-MF16 Chassis | Stock Plug/Heat Range: M12 Long Reach HEX16:6 | |
| 2008 - 2014 | MINI | COOPER | ALL | 1.6 | ALL | ALL | From 10/2007 Production Date | Stock Plug/Heat Range: M12 Long Reach HEX16:6 | ||
| 2007 - 2015 | MINI | COOPER | ALL | 1.6 | ALL | ALL | From 2/2007 Production Date | ABA-MF16S Chassis | Stock Plug/Heat Range: M12 Long Reach HEX16:7 | |
| 2008 - 2014 | MINI | COOPER | ALL | 1.6 | ALL | ALL | From 10/2007 Production Date | Stock Plug/Heat Range: M12 Long Reach HEX16:7 | ||
| 2008 - 2015 | MITSUBISHI | LANCER | ALL | 2.0 | ALL | 4B11 | From 10/2007 Production Date | CZ4A Chassis | DOHC MIVEC | Stock Plug/Heat Range: M12 Long Reach HEX16:8 |
| 2007 - 2012 | MITSUBISHI | OUTLANDER | ALL | 3.0 | ALL | 6B31 | From 9/2007 Thru 10/2012 Production Date | CW6W Chassis | Stock Plug/Heat Range: M12 Long Reach HEX16:7 | |
| 2012 - 2012 | MITSUBISHI | OUTLANDER | ALL | 2.4 | ALL | 4B12 | From 10/2012 Production Date | GF8W Chassis | Stock Plug/Heat Range: M12 Long Reach HEX16:6 |
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
4.5 ★★★★★
Based on 22 reviews
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Product Reviews
★★★★★ 5
I would rescue it from a fire even if it were empty. I'm kidding but I do like this sleeve a lot.
Color: Orange, Size: 13-inch for New MacBook Air & Pro
Fits perfectly. Superb padding. The corner padding inspires confidence-not that I want to test it! The orange color is-chef's kiss-beautiful. A perfect contrast to the midnight color of my MacBook. I could gush about that stuff all day. But you all want to know about the other stuff.
Zippers: Two YKK no snag bi-directional closers for the main opening and a solo no snag YKK for the side pocket.
Outside: Feels like tactical nylon type fabric. I haven't and won't intentionally test its stain resistance. But I suspect it would clean up just fine.
Interior: A very soft microfiber like interior covering an odor free padding that is firm yet forgiving. There is a recess you push your laptop into making for a snug fit that, like I wrote earlier, inspires confidence. This sleeve is larger than some competing brands but seeing the recess in person explains why.
Having touched on the size of this sleeve, it maintains the svelteness of my MacBook Air. Yes, it is thicker than some other sleeves, by a smidge. However the additional protection suggested but that smidge, that minute extra ish is worth it to me. The sleeve fits in my travel backpack, so that's all good.
Lastly, I would consider putting a tablet or phone in the sidepocket but not anything that would concentrate the any energy that dissipates during a fall. Had I designed this product I wouldn't have included the side pocket. It's great for documents and thin things but the sell page suggests chargers. That seems like inviting risk. You do you.
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Reviewed in the United States on January 22, 2026
★★★★★ 4
Better Lips, Better Fit, Less Nonsense
Color: Black, Size: 13-inch for New MacBook Air & Pro
I tested this sleeve with a 13.6” MacBook Air (M4), and the difference is immediately noticeable.
First thing: fit. This one actually holds the laptop in place. The padded “lips” in the corners create just enough resistance that you have to guide the MacBook in and out. It’s not a loose drop-in like other cases — it feels controlled. If I shake it, there’s barely any movement, which is exactly what I was looking for.
Second: build quality. The stitching is clean and consistent — almost surgical compared to the wrinkled mess I saw on another model. The outer fabric stays flat, no weird waves or cheap-looking folds. The interior lining is softer and thicker too, so it feels more protective without being bulky.
Third: structure. I even did a quick “real-world” test — stood it vertically on a mattress, zipper open, applied pressure from the top — and it held its shape. The other case I tried would have collapsed immediately. This one actually feels like it can handle normal use without transferring pressure straight into the laptop.
The external pocket is simple but practical. It fits the charger brick and cable without interfering with the main compartment, which keeps the laptop fit intact.
Only downside: I could do without the orange accents. A full black version would be perfect. But honestly, that’s cosmetic — functionally, this one does what it’s supposed to do.
At around this price point, this feels fair. Not luxury, not overhyped — just a well-executed, practical sleeve that gets the fundamentals right.
Bottom line: not perfect, but finally something that feels properly made and actually holds the laptop instead of just surrounding it.
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Reviewed in the United States on March 29, 2026
★★★★★ 5
Great Laptop Case !
Color: Black, Size: 13-inch for New MacBook Air & Pro
This case is reallllly nice and durable, the cushioned corners is what really makes this case special imo. The outer layer is a nice durable think fabric. It fits perfectly. The only downside is the zipper traction is not as smooth as I would like ,,, but I guess I can fix that with some oil/wd40. I would recommend this laptop case ! 👌🏽👌🏽👌🏽
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Reviewed in the United States on March 24, 2026
★★★★★ 5
It’s perfect!
Color: Light Blue, Size: 15-inch for New MacBook Air, Color: Light Blue, Size: 15-inch for New MacBook Air
This case matches my MacBook Air perfectly! It’s definitely going to protect your laptop and it’s really well built and designed. So glad I went with this case than the other brands!
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Reviewed in the United States on May 18, 2026
★★★★★ 5
Reliable and Versatile Adapter for My MacBook Air
I have a 13-inch MacBook Air, M4, 2025, and I use it for everything: work, watching videos and series, and occasionally gaming. I also regularly attend court hearings and professional meetings through Zoom, Google Meet, and similar platforms, so I cannot afford connection issues.
This adapter, especially with its LAN port, has been very useful. It gives me more confidence when attending hearings online because I can rely on a stable wired connection. It also works well while connecting other devices, such as microphones or pen drives, which makes it very versatile.
The finish and materials feel solid and high-quality. I used to have a white plastic adapter from another brand, but it ended up changing color with use. This one stays cleaner, looks more professional, and is easier to keep in good condition.
It is easy to carry, practical, and very efficient.
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Reviewed in the United States on May 4, 2026
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