AEM Liquid Filled Fuel Pressure Gauge (0-100 Psi) - 38mm (1.5'') Black Dial Face

    The AEM Electronics Liquid Filled Fuel Pressure Gauge allows you to monitor fuel system pressure directly at the source. It connects to any 1/8” NPT port—such as on an AEM fuel rail or adjustable pressure regulator—and uses silicone fluid damping to deliver steady, accurate readings between 0–100 PSI.

    Discover the key features of this pressure gauge and how they contribute to accuracy, durability and ease of use in your setup:

    • 1/8” NPT Male Thread Fitting: Designed to mount directly into a compatible fuel rail or regulator, this fitting provides a tight and secure seal that allows you to measure pressure exactly where it matters, ensuring precise system tuning and fuel delivery control.
    • 0–100 PSI Analogue Readout: The mechanical dial clearly displays fuel pressure within a useful 0 to 100 PSI range, giving you real-time feedback to help diagnose issues or confirm adjustments during setup, maintenance or tuning.
    • Silicone Fluid Filling: The case is filled with silicone oil to dampen needle movement caused by engine vibration, which improves readability and delivers more stable readings for consistent adjustments and better reliability.
    • Stainless Steel Gauge Housing: Built with a corrosion-resistant stainless steel case, this housing protects the internal mechanism from environmental damage, helping extend gauge life and maintain accuracy in exposed engine bays.
    • Black Finish: The external housing is finished in black for a low-reflection, functional appearance that blends easily into your engine bay layout while offering added surface protection.

    By fitting this gauge directly to a key point in your fuel system, you get immediate insight into system pressure without relying on remote sensors or digital displays. It’s a useful addition to your tuning setup, especially when making adjustments to regulators or verifying consistent supply to the injectors. With its robust design and simple installation, this gauge is a smart choice for refining fuel delivery and diagnosing pressure-related issues.

    Dimensions: 38mm (1.5") diameter

    09.08.2026, 10:02:43

    Demon Tweeks was established in 1971 to service the needs of the motorsport competitor and our principals of offering top products, quality, service and rapid availability are as important to us today as they were in the very beginning. We are leaders in the supply of race wear, competition and road tuning parts for cars and bikes. Within a staff totalling over 140 is a dedicated sales team servicing upwards of 3000 telephone and online enquiries received every day from the UK and the rest of the world.

    Our impressive 140,000 sq.ft. Superstore and warehousing facility in Wrexham, North Wales allows us to carry around £7 million worth of stock at all times, over 256,000 items – more than any competitor. Our rapid despatch and no quibble money back guarantee are here to give you the customer real confidence when ordering – you can count on us!

    UK DELIVERIES
    All items for sale in our eBay store are held in stock, most being offered with FREE UK MAINLAND DELIVERY (Northern Ireland, Scottish Highlands & Islands, Isle Of Man, Isle Of Scilly, Jersey and Guernsey are not eligible for free delivery unless the item can be sent in the post). If you choose the free delivery, the item will be sent via the most cost effective means possible, i.e. Parcelforce courier or 2nd class post (you can see which in the “Postage, returns and payments” tab). Please note: We are advised by Royal Mail that items sent 2nd class post can take up to a maximum of 14 working days to be delivered.

    OVERSEAS DELIVERIES
    Using eBay’s Global Shipping Program we ship to over 100 countries worldwide — and counting! When you view the item, you’ll see the item price plus estimated shipping and import charges. Once you purchase the item, the final charges appear at checkout. That means no additional charges or surprises when your item arrives. If your parcel is lost or damaged along the way, the GSP protections and policies will cover you.

    CAN I CHANGE MY ADDRESS ONCE I'VE PLACED MY ORDER?
    Please note, we run an automated system on eBay and the address details that come through to our system from eBay are the details you input at the checkout page and this is the address that we have to ship the order to.

    I'VE ADDED A NOTE TO MY ORDER, CAN YOU VIEW IT?
    Not always. As above, because of the automated system we operate and the sheer volume of orders we get, we CANNOT guarantee that we will see any eBay notes that you add to your purchase. If it is something vital to your order, please contact us via the eBay messaging system before purchasing.

    RETURNS
    Goods deemed unsuitable or not required may be returned via eBay for a refund if they are returned to us within a 30 day period from date of original order, subject to the following and depending on reason.

    • The cost of postage and packaging to return the item to us is paid by you, the customer.
    • Items are to be returned unused and returned in their original condition & packaging.

    IMPORTANT
    All returns for items purchased via our eBay store need to be done via your purchase history within eBay by selecting the item/s you wish to return. Click on the item and then more options, request a return choosing the correct reason and we will respond and issue you a returns authorisation number and details to do so.

    We cannot accept responsibility for returned parcels which are undelivered or damaged in transit back to us. Please retain your proof of postage etc.. as you may require it in the event of a claim with your carrier.

    The easiest way to contact us is via the eBay message system.

    Business Hours:
    Monday - Friday: 8.30am - 5.00pm
    Saturday & Sunday: CLOSED
    BANK HOLIDAYS: CLOSED

    * PLEASE NOTE: Messages sent outside the working hours will be answered as quickly as possible during the next working day. Also, during periods of high demand, there may be additional delays in us responding.