SKU: 6101823642

Radium Engineering Fuel Rail Plumbing Kit | Multiple Subaru Fitments

Sale price$224.97 Regular price$249.97
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Description

Radium Engineering Fuel Rail Plumbing Kit | Multiple Subaru FitmentsMultiple Subaru Fitments Fuel Rail Plumbing Kits by Radium Engineering These plumbing kits are designed to compliment Radium Engineering Subaru EJ fuel rail installations. Both kits interface with the factory feed and return hard lines in the engine bay (near the LH strut tower) and provide all the underhood fuel plumbing. All necessary fittings and hoses are included, along with an adjustable high flow fuel pressure regulator. Two kits are offered;

Multiple Subaru Fitments Fuel Rail Plumbing Kits by Radium Engineering 

These plumbing kits are designed to compliment Radium Engineering Subaru EJ fuel rail installations. Both kits interface with the factory feed and return hard lines in the engine bay (near the LH strut tower) and provide all the underhood fuel plumbing. All necessary fittings and hoses are included, along with an adjustable high-flow fuel pressure regulator. Two kits are offered; one that feeds the fuel rails in series, and another that feeds the fuel rails in a parallel configuration. Both kits perform equally well. The end decision is based on personal preference. Scroll down for details on each kit.

This kit interfaces with the factory hard lines near the LH strut tower using SAE quick-connects or older hose barb connections. An adjustable Radium Direct Mount Regulator (DMR) and Radium 0-100psi fuel pressure gauge are included. The fuel pressure gauge can be installed at any of the 6AN junctions before the regulator using the included adapter. The 6AN swivel fuel rail fittings are low profile making them ideal for the tight spaces associated with the EJ motor. The variety of reuseable PushLok hose ends permit customizing (such as adding a flex-fuel sensor) making installation quick and painless. The included 6AN fuel hose can be cut with standard tools and assembled without special skills. Unlike standard low-quality rubber fuel hose that degrades with alternate fuels, the provided hose is resistant to all fuels including E85. The contents of the 20-0578 kit are shown in the photo below.

Because the hoses and fittings are consolidated, the parallel kit is a good option for cleaning up the engine bay. Each fuel rail is fed as shown in the photo above. The feed and return lines enter the Radium Multi-Port Regulator (MPR) from the rear and output through the front to the fuel rails.

Features

  • Includes all necessary fittings are hardware
  • Parallel or Series options are available
  • Compatible with different fuel types like E85, methanol, etc.
  • Adjustable Radium Direct Mount Regulator (DMR) and Radium 0-100psi fuel pressure gauge are included

Benefits

  • Replaces old fuel delivery components that may be worn out
  • Easily customizable
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. 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
SKU: 6101823642

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thunderkitten
Bozeman, US
★★★★★ 1
I wouldn’t call it a ribbed shirt if it’s almost see through
Size: Medium, Color: Black
Cheap thin looking fabric returned it
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Reviewed in the United States on February 13, 2026
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MH
Lowell, US
★★★★★ 3
Runs large with gaping arm holes.
Size: Large, Color: White
This runs extra large and the arm holes are gaping. You can see your undergarments through the arm holes. I am hoping that the shirt shrinks in the wash.
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Reviewed in the United States on January 17, 2026
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Marie Grey
Cuba, US
★★★★★ 5
Fantastically Awesome!
Special Size: Wide Leg Crop, Size: 12, Color: Black
They are spectacular! Very nice quality and I love how they fit. Got the black and ice blue. Having read the reviews, I did go ahead and sized up 2 sizes and it worked perfectly. That is the only con in these jeans, they run at least 2 sizes too small. But, being 100% cotton, I expect that they will shrink down to pretty close my normal size. (I like jeans loose, so it's all good.) Got the cropped ones and I just love them. They are normal length now (because I am short), but after drying, I think they will end up at top of my ankle, and that is cool. The fabric is on the heavy side, but I expected them to be much heavier than what I got. I have a pair of Lee wide leg jeans, and they are much heavier than these. I hope that helps someone in terms of comparison. But overall, these jeans are fantastically awesome - and on sale too boot!! Buy them. They are very wonderful. ❤️
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Reviewed in the United States on June 11, 2026
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Eliza
Fort Morgan, US
★★★★★ 5
Insanely great jeans for the price!
Special Size: Wide Leg Crop, Size: 12, Color: Medium Blue Vintage
I’m obsessed with these jeans. They’re comfortable and I think they legitimately look great. I had a baby 6 months ago and my body is “in transition” so I didn’t want to buy anything too expensive. These are cute, fit well, good quality. Excellent for short girls - I’m 5’ tall and they’re exactly the right length for a full-length jean. I feel like they’re fashionable without being too trendy (they work for 30somethings as well as 20somethings). They’re nice thick cotton with very little stretch. Because of that I’d be conservative with sizing because they do stretch significantly when you wear them. I got these in the lighter blue, too. The darker wash is slightly smaller and I wound up liking the color better, too. But the light wash is nice.
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Reviewed in the United States on November 16, 2025
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Lynn
Lexington, US
★★★★★ 4
Excellant value
Special Size: Wide Leg Crop, Size: 14, Color: Rinse, Special Size: Wide Leg Crop, Size: 14, Color: Rinse
Purchased the “cropped” length. I am 5ft 3.5 inch. Weight 170lbs (42 inch hip/38 inch waist) normally wear a size 10/12 or 31 in jeans, depending on the brand. I ordered up at 14 for these based on other reviewers. (When held up to other jeans they were the same as a Talbots 10 at the waist) Prewash they felt good, a little big& length hit at the top of my foot. After wash and dry, the fit was almost perfect and the length was at lower ankle. Ordering up is probably the right choice, although I think I could have been comfortable in a 12 (with no drying). They are a tad bit too long for a “cropped” look IMO. The wide leg is a true wide leg and falls straight from the waist. The material is heavy and there is almost no give/stretch - so a traditional denim. This is the dark blue and it is a true dark blue. You can’t beat the price, excellent value.
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Reviewed in the United States on March 31, 2026

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