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We have not bolted this fuel kit onto an engine ourselves. Instead, we read through the product spec sheet and the buyer reviews attached to the listing.
Below, we cover what comes in the bundle, what it costs and how early buyers feel about it once it is installed.
Kit Contents and Price
This bundle combines a regulator with a long run of PTFE hose. On the listing, the full name is EVIL ENERGY LS Swap Fuel System Kit.
It costs $189.98, down from $223.98 when we checked the listing. The package contains these parts:
- A 6AN regulator that adjusts fuel pressure, with a housing made of aerospace-grade aluminum
- Nylon-braided PTFE line, 25 feet long
- Adapters and fittings sized in 6AN and made for LS swap and EFI systems
- Your pick of pressure adjustment range: 20 to 120 PSI, 30 to 70 PSI or 30 to 140 PSI
The spec sheet gives the fuel line an inner diameter of 5/16 inch. Working pressure goes up to 1,500 PSI, and the burst rating is 4,500 PSI.
Temperatures between negative 76°F and 446°F fall inside the line’s listed operating range. The brand also says the line works with gasoline, diesel and E85.
What Early Buyers Report
The listing shows 7 customer reviews, and 86 percent of them are five-star.
That is a small sample. We see it as an encouraging early sign, not a final verdict.
One buyer said the throttle feels more responsive after the upgrade and that the overall driving experience is better.
That fits what an adjustable regulator is meant to do on an LS swap that runs slightly lean or rich at the factory setting.
Fast shipping also earns praise in the reviews. Across the brand’s Trustpilot feedback, quick delivery ranks among the compliments that buyers repeat most.
Who This Kit Suits
This kit makes the most sense for an LS swap or an EFI conversion. You get a regulator and a fuel line in a single order, so there is no need to source each part separately.
The three pressure ranges cover most naturally aspirated builds and mild forced-induction setups.
Anyone planning serious track use or a big power adder should think carefully before buying. The choice of fuel line material grows in importance when heat and pressure climb.
For a daily-driven swap on a real budget, the kit delivers the specs that count. You would pay far more for a similar bundle from Earl’s or Fragola.
One Caution About Heat
On forums, some builders who run EVIL ENERGY PTFE line from other parts of the catalog said it ages more quickly in hot conditions than premium options such as Russell or Earl’s.
That comment concerns the material of the line family, not this particular kit.
Even so, builds that run hot should keep an eye on the line throughout the first year.
Before You Install
Make sure each AN fitting seats properly when you tighten it with a wrench. Brand-wide reviews included a handful of reports that fittings on some kits came in slightly off standard sizing.
Spending five minutes on this check before you cut the line to length is worth the time.
Warranty and Where to Buy
The kit ships with EVIL ENERGY’s standard coverage. That means a warranty of at least 1 year, plus 180 days to send it back.
Free return shipping applies during the first 90 days, provided the kit has not been used and remains in the original packaging.
Purchase only through EVIL ENERGY’s website or its verified Amazon store. Sticking to those two sources matters for warranty claims.
Our Verdict
At this price, the kit offers solid specs. The regulator is truly adjustable, the PTFE line is rated for E85, and the length is enough to run through most engine bays. Early reviews support all of that.
No one should mistake it for race-grade equipment, and EVIL ENERGY makes no such claim. As a budget LS swap or EFI conversion option, it stands out as one of the more complete single-order kits we found while researching this brand.