★★★★★ 5
Worked perfectly
Excellent product
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 26, 2026
Radium Engineering 99-05 Mazda MX-5 RA-Series Fuel Pressure Regulator Kit
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
Radium Engineering 99-05 Mazda MX-5 RA-Series Fuel Pressure Regulator KitFuel pressure regulator kit for NB Miata MX 5. Provides means for adjustable fuel pressure. Installation is completely reversible. Can be used with OEM fuel pump hanger or Radium fuel pump hanger.
Quick Dispatch:
Your Radium Engineering 99-05 Mazda MX-5 RA-Series Fuel Pressure Regulator Kit orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
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You'll receive a tracking link by email once your Radium Engineering 99-05 Mazda MX-5 RA-Series Fuel Pressure Regulator Kit 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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4.5 ★★★★★
Based on 2408 reviews
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Product Reviews
★★★★★ 4
Check the gap!
Plugs work great. I will say for those reviews saying they got a dud. CHECK THE GAP!!! Both plugs were not at 0.030 as advertised. I gapped the plug and it worked perfectly.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 7, 2026
★★★★★ 5
Great
Needed one for my mower, got a box of 2. Works great!
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Reviewed in the United States on May 20, 2026
★★★★★ 3
Didn’t work well in my B&S engine
Worked for 15 minutes. Repeatedly stalled. Replaced with name brand and ran like new.
UPDATE. Seller immediately offered refund well outside refund window of opportunity. That’s nice to have someone stand behind their product
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 9, 2026
★★★★★ 5
Lawnmower sparkplug
Worked great, easy to install, fast replacement. And 2 for the price of one.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 8, 2026
