ACUITY Instruments K-Series Fuel Rail in Satin Black Finish

• 15mm (0.59") bore supports 1000+hp 
• 1/8 NPT gauge port
• -8 ORB center-feed port for tucked fuel lines
• -8 ORB end ports for OEM, side-feed, or return setups
• 6061-T6 billet aluminum construction
• Satin black anodized finish
• Includes class 10.9 zinc-plated mounting hardware

Description

Fittings sold separately.

Whether upgrading for additional fuel delivery needs, to run upgraded fuel lines, or to simply clean up your engine bay, ACUiTY's K-Series High-Flow Fuel Rail is the most versatile and refined solution available. With it's 1/8 NPT port on top, -8 o-ring boss (ORB) ports on both ends and another -8 ORB port located at the middle of the rail, there are a variety of ways you can set the rail up for your car (see "Fitment Info" for application-specific fitting requirements). Each rail is constructed from 6061-T6 aluminum and has a satin-texture, anodized finish with laser-etched technical info and logos. 

Among the rails' other features are countersunk mounting screw holes and supplied class 10.9+ hardware to replace the OEM studs. Each rail is also supplied with a stainless steel 1/8 NPT plug in case a top-mounted fuel pressure gauge is used. The end locations for the -8 ORB ports have been specifically machined to help reduce the likelihood of wrench damage to the rail's cosmetic finish during installation. As an added bonus rarely found on aftermarket rails, the rail allows the end-user to retain the OEM injector clips if you wish, just for some added peace of mind.

Tons of possible configurations (using optional fittings, sold separately). See the "Fitment Info" tab for a list of fittings by vehicle and configuration.

Side-feed for OEM fuel lines on many vehicles:

Center-feed using a -6AN line:

Return setup with -6AN line for k-swaps and high horsepower applications: 

Return setup with -8AN line for k-swaps and very high horsepower applications:

Multiple fuel pressure gauge mounting options:

Mount a gauge on top using the 1/8 NPT Port, or plug the port if you prefer:

 

Or mount a gauge on the side of the rail using the 1913-F05 adapter fitting (sold separately):

Design retains OEM injector mounting clips for extra peace of mind:

 

ACUiTY has made 6 unique fittings (sold separately) available for the rail to help you customize it exactly to your needs. The fittings are as follows:

• 1913-F02: -8 ORB Plug
• 1913-F03: -6AN adapter
• 1913-F04: -8AN adapter
• 1913-F05: 1/8 NPT adapter
• 1913-F06: 5/16" Quick-Disconnect adapter, short
• 1913-F07: 5/16" Quick-Disconnect adapter, long

Kit Contents

Each kit includes:

• 1x fuel rail
• 2x class 10.9 mounting screws
• 1x stainless steel 1/8 NPT plug.

You will need PTFE thread sealant (do not use teflon tape on fuel systems as it can foul injectors), and the appropriate fittings for your application. For a complete solution, see our application-specific fuel line kits.

Fitment Info

Fits most K-Series engines except for the direct-injected K20C and K20B engines

Fitting requirements vary based on application. Please see the application list and fitting requirements below:

• 2001-2005 Civic Si and Type R
  2002-2006 Acura RSX, RSX-S, and Integra Type R
  2012-2015 Honda Civic Si
• With OEM Fuel Line and side-mounted gauge
  (1x) 1913-F02 (-8 ORB Plugs)
  (1x) 1913-F05 (1/8 NPT Adapter)
  (1x) 1913-F06 (5/16" Short Quick-Disconnect Adapter)
• With OEM Fuel Line and top-mounted gauge or no-gauge
  (2x) 1913-F02 (-8 ORB Plugs)
  (1x) 1913-F06 (5/16" Short Quick-Disconnect Adapter)
• With -6AN center-feed or side-feed fuel lines and side-mounted gauge
  (1x) 1913-F02 (-8 ORB Plugs)
  (1x) 1913-F03 (-6AN Adapter)
  (1x) 1913-F05 (1/8 NPT Adapter)
• With -6AN center-feed or side-feed fuel lines and top-mounted gauge or no-gauge
  (2x) 1913-F02 (-8 ORB Plugs)
  (1x) 1913-F03 (-6AN Adapter)
  
• With -6AN return-style fuel lines
  (1x) 1913-F02 (-8 ORB Plugs)
  (2x) 1913-F03 (-6AN Adapter)
• With -8AN return-style fuel lines
  (1x) 1913-F02 (-8 ORB Plugs)
  (2x) 1913-F04 (-8AN Adapter)
• 2006-2011 Honda Civic Si and Type R
• With OEM Fuel Line and side-mounted gauge
  (1x) 1913-F02 (-8 ORB Plugs)
  (1x) 1913-F05 (1/8 NPT Adapter)
  (1x) 1913-F07 (5/16" Long Quick-Disconnect Adapter)
• With OEM Fuel Line and top-mounted gauge or no-gauge
  (2x) 1913-F02 (-8 ORB Plugs)
  (1x) 1913-F07 (5/16" Long Quick-Disconnect Adapter)
• With -6AN center-feed or side-feed fuel lines and side-mounted gauge
  (1x) 1913-F02 (-8 ORB Plugs)
  (1x) 1913-F03 (-6AN Adapter)
  (1x) 1913-F05 (1/8 NPT Adapter)
• With -6AN center-feed or side-feed fuel lines and top-mounted gauge or no-gauge
  (2x) 1913-F02 (-8 ORB Plugs)
  (1x) 1913-F03 (-6AN Adapter)
• With -6AN return-style fuel lines
  (1x) 1913-F02 (-8 ORB Plugs)
  (2x) 1913-F03 (-6AN Adapter)
• With -8AN return-style fuel lines
  (1x) 1913-F02 (-8 ORB Plugs)
  (2x) 1913-F04 (-8AN Adapter)
• K-Swaps
• With -6AN center-feed or side-feed fuel lines and side-mounted gauge
  (1x) 1913-F02 (-8 ORB Plugs)
  (1x) 1913-F03 (-6AN Adapter)
  (1x) 1913-F05 (1/8 NPT Adapter)
• With -6AN center-feed or side-feed fuel lines and top-mounted gauge or no-gauge
  (2x) 1913-F02 (-8 ORB Plugs)
  (1x) 1913-F03 (-6AN Adapter)
• With -6AN return-style fuel lines
  (1x) 1913-F02 (-8 ORB Plugs)
  (2x) 1913-F03 (-6AN Adapter)
• With -8AN return-style fuel lines
  (1x) 1913-F02 (-8 ORB Plugs)
  (2x) 1913-F04 (-8AN Adapter)

Install Guides

Click Here for the 1913 Install Guide (Performed on an 8th Gen Honda Civic Si using OEM fuel line)

*We are working on guides for the RSX-S and 9th Gen Si presently, but if you are installing on these applications in the meantime, note that the install process is nearly identical on these platforms as on the 8th Gen Civic Si, for which there is a guide above. If you have specific questions about your application and the install process, feel free to reach out to us using our Contact Us page.