IAG V3 Top Feed Fuel Rails for 2002-14 Subaru WRX, 07-20 STI, 08-12 LGT, 06-13 FXT (Black Finish).

The IAG Performance V3 Top Feed Billet Aluminum Fuel Rails with phenolic spacers 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 and IAG's fuel rails were real-world tested to 1000hp. All IAG fuel rails are engineered and manufactured at the IAG facility in Westminster, Maryland. The rails are machined from a solid 6061 billet aluminum and feature an anodized black finish with the IAG logo engraved on the top.Kit Includes: (x2) Billet Fuel Rail, (x4) Zinc coated M8x30mm socket head cap bolt, (x4) Phenolic Spacers, (x4) O-rings, (x2) Hex Head Threaded Plugs,Confirmed To Fit: Injector Dynamics,Fitment Issues: Process West TGV Deletes may require 5mm shorter bolts to properly work with the IAG V3 fuel rails. The shorter hardware is not included in our kit.,Please note aftermarket lines and fittings are required to fit IAG Fuel Rails- they can be purchased separately,The anodized finish varies in color based on the manufacturing process. The color may differ from the product pictures shown.