★★★★★ 5
Good stuff!
Yamaha F150 running great!
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Reviewed in the United States on August 11, 2021
HKS SUPER FIRE RACING M40
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
HKS SUPER FIRE RACING M40SKU: 50003 M40 UPC: 4957266720219 HKS Super Fire Racing M40 Spark Plug 2002 2021 Subaru Impreza WRX STI Legacy GT Forester XT HKS Super Fire Racing M40 is a high performance iridium spark plug designed for racing and tuned applications. It fits 2002 2021 Subaru Impreza WRX STI Legacy GT Forester XT models with EJ20 EJ25 engines. Expect stronger ignition sparks for better combustion higher horsepower throttle response and extended plug life under
Quick Dispatch:
Your HKS SUPER FIRE RACING M40 orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
Order Tracking:
You'll receive a tracking link by email once your HKS SUPER FIRE RACING M40 ships.
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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
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4.7 ★★★★★
Based on 2086 reviews
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Product Reviews
★★★★★ 5
Excellent quality
Great quality kit
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Reviewed in the United States on December 24, 2025
★★★★★ 5
Boating maintenance
Perfect replacement parts for your scheduled maintenance, great price
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Reviewed in the United States on December 25, 2025
★★★★★ 5
worked great at fair price
works fine on my 1994 volvo penta 3.0 GL the main gasket was wrong, but my 3.0 GL does not have a gasket, the other parts appear to be universal
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Reviewed in the United States on June 5, 2025
★★★★★ 4
Good fit
Worked well with no problems.
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Reviewed in the United States on February 24, 2026
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