70mm Billet Fuel Filter Regulator: 10 Micron Setup Guide
By DeatschWerks | Published: 2026-10-14
Category: Product Reviews
A practical buying guide to the DeatschWerks 70mm billet fuel filter regulator, covering 10 micron filtration, 8AN plumbing, and fitment decisions for EFI builds.
Quick answer
The DeatschWerks 70mm Billet Fuel Filter Regulator (product ID 2680492) is a combined 10 micron filter and pressure regulator in one billet housing with 8AN inlet and outlet fittings. It is a strong choice for EFI builds that want fewer connections, protected injectors, and a single mounting point. If you need to run a factory-style quick connect or a specific regulator location far from the filter, a separate filter and regulator may fit better.
Why combine filtration and regulation in one housing
A fuel filter regulator combo places the filter element and the pressure regulator in the same billet body. That layout removes one set of fittings and one return line junction from the system, which reduces potential leak points and simplifies mounting. It also keeps the regulator close to the filter, so debris captured by the 10 micron element does not travel farther downstream before pressure is set.
The trade-off is service access. With a combined unit, you service the filter element and the regulator in the same location. If your chassis makes that spot hard to reach, a separate filter and regulator can be easier to maintain over time.
10 micron filtration and what it protects
A 10 micron fuel filter element traps particles that are small enough to pass through coarser filters but still large enough to wear or clog sensitive fuel injection components. In an EFI system, that protection matters most at the injectors and the high-pressure pump inlet. The DeatschWerks 70mm unit uses a 10 micron element for this reason.
Do not assume a 10 micron filter is correct for every fuel. If you run a low-pressure carbureted system, a 10 micron element may load faster than a coarser filter and need more frequent replacement. For EFI, 10 micron is a common and sensible choice when the filter is placed after the tank and before the injectors.
8AN plumbing and fitment decisions
The 70mm Billet Fuel Filter Regulator uses 8AN inlet and outlet fittings, so it integrates with common 8AN hose ends and adapters. If your fuel system is already plumbed in 8AN, this reduces the number of adapter fittings you need. If your tank outlet or fuel rail uses a different size, you will need adapters to step up or down.
For a factory EFI quick connect, the DeatschWerks 8AN to 5/16 in EFI Quick Connect (product ID 2678034) joins an 8AN ORB male fitting to a 5/16 inch male EFI quick connect and includes an O-ring. That adapter is useful when you want to keep a factory-style connection at the tank or rail while running 8AN line to the regulator. Confirm the thread and quick connect size on your specific vehicle before ordering, because the catalog facts list only the 8AN ORB and 5/16 inch EFI quick connect ends.
Service parts and long-term ownership
The DeatschWerks Filter Housing End Cap (product ID 2678769) is a set of two 10AN end caps for a fuel filter housing, SKU 8-04-01 under the Standard option. These are service and assembly parts for a filter housing, not a direct replacement for the 8AN fittings on the 70mm regulator. If you already own a compatible DeatschWerks filter housing, keeping a spare set of end caps can shorten downtime during a filter service.
Check the size before you buy: this end cap set is listed as 10AN, while the 70mm regulator uses 8AN inlet and outlet fittings. The two are not interchangeable without an adapter, and the catalog does not list a 10AN-to-8AN adapter in this record.
Decision rules for choosing this regulator
- Rule 1: Match your line size first: If your feed and return lines are already 8AN, the 70mm regulator's 8AN inlet and outlet fittings are a direct match. If you run 6AN or factory hard lines, plan for adapters before you buy. Check both feed and return sizes, not just the feed.
- Rule 2: Confirm you want combined service: Choose the combined unit when you want one mounting point and fewer connections. Choose separate components when your chassis makes the filter location hard to reach for element changes. Service access is the main reason to split the two functions.
- Rule 3: Use 10 micron for EFI, not every fuel system: The 10 micron element suits EFI systems where injector protection matters. Low-pressure carbureted systems may be better served by a coarser filter to avoid frequent loading. Filtration rating should follow the fuel system, not the other way around.
- Rule 4: Keep the right service parts on hand: The 10AN Filter Housing End Cap set fits a compatible DeatschWerks filter housing, not the 8AN ports on the 70mm regulator. Buy the correct size for your housing. Do not assume end caps and regulator ports share a size.
Product facts
- 70mm Billet Fuel Filter Regulator 10 Micron with 8AN Fittings: DeatschWerks 70mm Billet Fuel Filter Regulator, 10 micron element, 8AN inlet and outlet fittings, billet aluminum housing. Combines filtration and pressure regulation in one unit, reducing fittings and leak points while protecting fuel injection components.
- 8AN to 5/16 in EFI Quick Connect: DeatschWerks 8AN to 5/16 in EFI Quick Connect, 8AN ORB male to 5/16 inch male EFI quick connect, O-ring included, anodized DW Titanium finish, SKU 6-02-0123. Lets you adapt a factory-style 5/16 inch EFI quick connect to an 8AN line without custom hose work.
- Filter Housing End Cap: DeatschWerks Filter Housing End Cap, set of two 10AN end caps, SKU 8-04-01, Standard option. Useful as a spare or service part for a compatible DeatschWerks filter housing, but not a direct fit for the 8AN regulator ports.
Who should buy the 70mm Billet Fuel Filter Regulator
Best for
- EFI builds already plumbed in 8AN that want filtration and pressure regulation in one housing
- Owners who want to protect injectors and high-pressure pump inlets with a 10 micron element
- Installations where reducing fittings and leak points is a priority
Not for
- Low-pressure carbureted systems that may load a 10 micron element quickly
- Builds using 6AN or factory hard lines throughout without room for adapters
- Chassis where the combined filter and regulator location is difficult to service
