SKU: 37666558341

FUEL RAIL, TOP FEED CONVERSION, MAZDA 13B-REW SECONDARY

Sale price$135.90 Regular price$151.00
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Ships within 48 hours · Estimated delivery Jul 29 - Aug 3

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Description

FUEL RAIL, TOP FEED CONVERSION, MAZDA 13B-REW SECONDARYThis Radium Engineering secondary fuel rail is for the Mazda 13B REW rotary engine. With the use of the provided 2AN ORB plugs, this adaptable design permits both the OEM 2 port intake manifold and aftermarket 4 port intake manifolds. The aluminum fuel rail is anodized black for compatibility with all popular fuel types including E85. Manufactured with a large internal bore, the fuel rail can support all necessary engine power requirements. The three

This Radium Engineering secondary fuel rail is for the Mazda 13B-REW rotary engine.

With the use of the provided 2AN ORB plugs, this adaptable design permits both the OEM 2-port intake manifold and aftermarket 4-port intake manifolds.

The aluminum fuel rail is anodized black for compatibility with all popular fuel types including E85. Manufactured with a large internal bore, the fuel rail can support all necessary engine power requirements. The three 8AN ORB ports are compatible with these fittings. The extra center port allows additional fuel system accessories such as the OEM fuel temperature sensor, a pressure transducer, Radium fuel pulse damper, etc.

Insulating spacers and washers are included with stainless steel hardware to prevent thermal energy from conducting heat into the fuel. The two M8 extension mounts are made from stainless steel for superior strength and corrosion resistance.

For the OEM 2-port intake manifold, the included 20mm insulating spacers, billet injector seats, and 2AN ORB plugs will be used. Also, for the required space, an air control valve delete for the OEM 13B-REW intake manifold (sold separately) is required. See Radium 20-0449 HERE.

The included 14mm lower injector seats were designed specifically to be compatible with or without the OEM diffusers in place. They feature FKM O-rings making them suitable for boosted applications. NOTE: if using an Elite Rotary Shop 4-port intake manifold.

With this fuel rail, all lower intake manifolds variations are compatible with the fuel injectors listed below. For the Xcessive Manufacturing 4-port intake manifold, the included 11mm insulating spacers will be used.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
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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]
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SKU: 37666558341

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4.1 ★★★★★
Based on 30 reviews
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Verified Purchase
Josh
West Palm Beach, US
★★★★★ 5
Great cabin filter at a super price.
Size: 7.5" x 8.7" x 1.4"
I trust Bosch for car parts, and for the price and ease of installation, I'd take it over the Subaru OEM part any day. This is an easy replacement that the dealer would charge x4 the price to do.
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Reviewed in the United States on March 26, 2026
R
Verified Purchase
Rudy
Boise, US
★★★★★ 5
Fits 2021 RAV4 TRD
Size: 7.5" x 8.7" x 1.4"
Best fitting filter I’ve bought from Amazon. it doesn’t have any bends or creases from being put in. Fits like a glove
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 4, 2026
M
Verified Purchase
Mr Frosty
Louisville, US
★★★★★ 5
Good fit, good value
Style: CF12436 Classic, Style: CF12436 Classic
Purchased this filter for my 2023 Outback. First off changing the cabin filter on this model Subaru is amazingly easy and can be done with no tools and no more then 5 minutes. Pictures posted show packaging, the paper "Blue" filter side, the "Black" charcoal side and the foam outer edge. The filter is well made and is very sturdy as the outer shell is plastic vs. other paper filters that are more flexible. Holding the filter in your hand and giving it a slite shake you can hear the activated charcoal within it. After installing the filter I had a few trips in the car, did I notice any difference in the air quality coming into the cabin....... no. But does this mean its not working? also no. What I can say is the filter fit snug and left no gaps, and with the plastic surroundings and foam in sure the filter will not be letting anything get by as it passes through the system. All and all this filter is well made and sturdy, and seems to be a good value with other paper only filters being about the same price.
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Reviewed in the United States on May 4, 2026
B
Verified Purchase
bin
Louisville, US
★★★★★ 5
Perfect Fit and Great Quality
Style: CF12552 Classic
The thickness is just right and fits perfectly. Easy to install, good airflow, and the air feels much cleaner after replacing the old filter. Great value for the price.
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Reviewed in the United States on May 22, 2026
S
Verified Purchase
Steph
Dallas, US
★★★★★ 5
Easy to install
Style: CF10374 Classic
The frame is made of hard plastic (color black) which fits perfectly in the air cabin filter system of a Toyota Tacoma 2006 V6. It holds it's shap quite well. The carbon filter is able to be seen and works so far. The quality seems good and the thickness of the filter is well made with a foam outter film that makes it fit my Tacoma very well. I'm happy with it. The ease of installation is good and it is well worth the money.
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Reviewed in the United States on March 9, 2026

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