The CJ Motorsports Stage 1 fuel return system for the 2003-2006 Nissan 350z uses the stock fuel pump output fitting and stock hardpipe which are found to be restrictive by as low as 500rwhp and as high as 550rwhp. The S1 kit includes an AN fitting adapter that is used to modify your stock hardpipe to accept a -8AN for the twin rail feed line.
This kit features a return correction kit which maintains swirl pot and siphon venturi function. This means that your vehicles fuel level gauge will work precisely the same, and you are able to use all the fuel in the tank just as stock. Without this correction kit, your car will not be able to use the last 1/3rd or so fuel in the tank.
Included in the Stage 1 kit are:
4. Twin Rail Feed Line
5. Premium Fuel Rails with Damper Ports
6. Rail Return Hoses
7. Regulator Kit
8. Fuel Return Hose
9. Return Correction Kit
This kit is the premium kit with the Damper ports for the best overall performance. You will need some additional parts to complete the kit from Nissan/Infiniti. If you would like to purchase the kit complete with these additional parts just let us know and we can get them for you for an additional charge.
2 x 22675-JA10A
2 x 17571-7Y00A
2 x 16618-JA10A
Heres the article explaining how to install the dampers: