These IAG Performance V3 Top Feed Billet Aluminum Fuel Rails with phenolic spacers are a game - changer for your Subaru's fuel system. They fit a wide range of Subaru models including the 2002 - 2014 WRX, 2007 - 2021 STI, 2008 - 2012 Legacy GT, and 2006 - 2013 Forester XT.
The factory fuel rails work in a series, but as your Subaru's horsepower goes beyond 350whp, they may struggle to deliver enough fuel to the last cylinder. This can lead to a lean condition and potential engine failure. The IAG billet fuel rails operate in parallel, ensuring each cylinder bank gets equal fuel and the same fuel pressure.
With a 5/8' ID bore, these rails are designed to accept - 8 O - ring boss fittings, greatly increasing the fuel volume available at high power levels. They've been tested up to 1000hp in real - world conditions.
The IAG V3 fuel rails also have a port for an optional fuel pressure pulsation damper between each pair of injectors. This helps maintain constant pressure by absorbing fuel oscillations.
The phenolic spacers between the rails and the TGV's reduce heat transfer from the engine to the fuel.
Features:
- CNC machined from 6061 billet aluminum
- Anodized finish in Black, Red, or Gold
- Engraved with IAG Logo
- 5/8' inch Bore I.D. for - 8 O - ring boss fittings
- 2 piece mounting design with Phenolic Thermo Spacers
- Recessed mounting hardware
- Integrated port for fuel damper between injectors
- Engineered and manufactured at the IAG facility in Westminster, Maryland.
What's in the box:
- (2) Billet Fuel Rail
- (4) Zinc coated M8x30mm socket head cap bolt
- (4) Phenolic Spacers
- (4) O - rings
- (2) Hex Head Threaded Plug
Please note: Aftermarket lines and fittings are required and can be bought separately. This product is confirmed to fit with Injector Dynamics. Process West TGV Deletes may need 5mm shorter bolts (not included) to work properly with the IAG V3 fuel rails.
Using these IAG V3 fuel rails is a great way to boost your Subaru's fuel system performance. First, make sure you have all the necessary aftermarket lines and fittings as they are not included in the kit and need to be purchased separately.
When installing, follow the instructions carefully. If you're using Process West TGV Deletes, you may need to find 5mm shorter bolts as the ones in the kit won't work in that case.
These fuel rails are built to last, but for optimal performance, keep an eye on the fuel pressure. If you choose to install the optional fuel pressure pulsation damper, it will help maintain a steady fuel pressure. The phenolic spacers will help keep the fuel cool by reducing heat transfer from the engine.
For maintenance, check the O - rings regularly for any signs of wear or damage. You can clean the fuel rails with a mild solvent and a soft cloth to keep them in good condition. Remember, these fuel rails are engineered and manufactured at a professional facility, so they are of high - quality, but proper use and maintenance will ensure they serve you well for a long time.
