IAG V2 Top Feed Fuel Rails | Subaru Multiple Fitments (IAG-AFD-2101)
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IAG V2 Top Feed Fuel Rails
The IAG Performance V2 Top Feed Billet Aluminum Fuel Rails are designed to increase the power ceiling on your Subaru's fuel system. The factory fuel rails function in a series, which means that each cylinder's fuel is delivered after the other. As horsepower rises past the 350whp mark, the stock rail often does not have the capacity to deliver fuel to the last cylinder effectively*.
As a result, that last cylinder can run lean, which can result in catastrophic failure. The IAG billet fuel rails are designed to eliminate this problem. First, our fuel rails operate in parallel format, each cylinder bank receives equal fuel, matching the flow between the rails ensures that each injector sees the same fuel pressure. Second, the bore of our rail is machined to 5/8" ID and is designed to accept -8 o-ring boss fittings. This configuration greatly increases the volume of the rail which means that more fuel is available at higher power levels.
These fuel rails were real world tested to 850hp. The V2 fuel rails also feature a port to add an optional fuel damper between each pair of injectors. Fuel dampers absorb fuel oscillations caused by injectors opening and closing. All Subaru’s are equipped with a fuel damper however its location is some distance from the injectors. The IAG V2 rails locate the damper between the injectors to smooth out the fuel flow.
The fuel rails are engineered and manufactured at the IAG facility in Westminster, Maryland. The rails are machined from a solid block of 6061 billet aluminum and feature an anodized black finish with the IAG engraved logo on the top.
- Increased horsepower
- Tuned and dyno-tested to improve acceleration and engine sound
- Low restriction aluminum tubing
- Easy to install using commonly available tools
- Air filter lasts up to 100,000 miles before cleaning is required (depending on driving conditions)
- Washable and reusable oil-free filter media
- AEM Lifetime Limited Warranty
- 2002-2014 Subaru Impreza WRX
- 2007-2016 Subaru Impreza STi
- 2007-2012 Subaru Legacy GT
- 2006-2013 Subaru Forester XT
What's In the Box?
- (x2) Billet Fuel Rail
- (x4) Zinc coated M8x20mm socket head cap bolt
- (x2) Hex Head Threaded Plugs
- (x8) 8mm Flat Washers
I was using a set of the AGP rails with their lines and distribution block, and they worked well. I made 722 whp on them, but I hated the way they looked in the bay, and they were only -6 lines. I absolutely love that these rails are -8 all the way through so I was able to take my -8 line coming from the fuel pump all the way through the rails and into the regulator. I looking forward to retuning this season and seeing 800. Additionally, the rails look great, fit great, and the recessed allen head bolts are a nice touch.
IAG fuel rails were easy to install and did exactly what I need then to. When pushing e85 and a ton of fuel it's nice to know that you have the best money can buy. And at a great price!!