SKU: 76145787795

HKS Super Fire Racing Spark Plug 50003-M525RE

$57.28 $63.64
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Description

HKS Super Fire Racing Spark Plug 50003-M525REM 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 # 10.5
Thread Size: 14mm × 12.7mm
Wrench Size: 20.8mm

Fits:

1983 - 1985 MAZDA RX-7 ALL ALL From 10/1983 Thru 9/1985 Production Date  SA22C Chassis  Stock Plug/Heat Range: ROTARY:9
1985 - 1988 MAZDA RX-7 R2 1.3 From 10/1985 Thru 8/1988 Production Date  FC3S/FC3C Chassis  Stock Plug/Heat Range: ROTARY:10,11
1988 - 1991 MAZDA RX-7 R2 1.3 From 9/1988 Thru 12/1991 Production Date  FC3S/FC3C Chassis  Stock Plug/Heat Range: ROTARY:7,9
1993 - 1995 MAZDA RX-7 R2 1.3 From 12/1991 Thru 8/2002 Production Date  FD3S Chassis  Stock Plug/Heat Range: ROTARY:7,9
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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  • 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
SKU: 76145787795

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4.7 ★★★★★
Based on 23 reviews
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Verified Purchase
DarkWing
Bozeman, US
★★★★★ 5
Great for your truck when you need just a little extra place to haul groceries.
Size: 59 inches
When you run out of room in the back seat of the truck, this is a little way to add a little structure and keep it from rolling around on the trip home. These are great in that they have compartments, as well as provide a wall to keep things form slamming to the front when you hit the breaks.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 26, 2026
B
Verified Purchase
Bob T.
Grantham, US
★★★★★ 5
Quality product, the double netting is great compared to single
Size: Doube Layer
It is a double net. It holds items down and is really stretchy which is great. Feels strong and has multiple carabiners/loops to tie down whatever you are hauling.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 26, 2024
C
Verified Purchase
Curtis Conley
Dallas, US
★★★★★ 5
Works great
Size: Doube Layer
Works great, love it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on October 4, 2025
N
Verified Purchase
Nina
Cuba, US
★★★★★ 5
Compact, stretches over loads, wish it had a bag.
Size: Doube Layer
I am giving the double layer netted version of this product, for my uses, a 5 star, though there are two negatives to consider up front. 1. There is no storage bag included. 2. And the 6 caribeaners included are too cheezie to trust. Yes, the caribeaners will hold the net, and I assume your heavy loads will be strapped down before netting it. So I did install them in the straps just because. Bur I'll be putting the thick straps around the edge over bed hooks. I can't speak on how the single layer net would work, but you really will think after getting the double layer, that was the right choice. The mesh is tightly made and should hold even the messiness bag of trash in your truck bed from blowing out if you get the double layer. When you stretch the net out, it does act like a membrane, so you need several hooks around your bed or trailer. It stretched tightly around 5.5 x 7.5 1975 Datson pickup bed trailer. As you remember these beds have hooks all the way around and a curled lip surrounding the top. So this is perfect for full edge coverage. But if you have few hooks, the net will pull inward between the points lile a membrane would. If you need a stiff heavy duty throw over style net, this is not it. After hooked down, there is a great amount of stretch to cover good sized loads. This net is also excellent for containing a tarp covered load, keeping the tarp from coming loose and flapping around in the wind which is always a challenge on long trips. Also it will help contain brush and trash so that ENCON won't ticket you for uncovered loads. Light weight, easy to use, and it should hold up well for the price. Use one of those left over Ryobe tool bags you have laying around, and some better dollar-store caribeaners, and you'll be ser!
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Reviewed in the United States on August 18, 2023
J
Verified Purchase
Johnny Bailey
Charlottesville, US
★★★★★ 5
Fit great
Size: Doube Layer
I love my truck bed net. It has been very useful in keeping my items secure in the bed of my truck.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 19, 2025

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