E85 requires lots of fuel. This return system is required to run it with the ACE kits.

Fuel Pressure Gauge is Included in Price.

Superseding the popular CJM S1 return fuel system for the 370z & G37, the S1.E kit features a host of updates and improvements. Due to the popularity of E85 among or customers, the system has been entirely reimagined to better accommodate this fuel. For builders seeking the maximum performance from the factory fuel rails, this is our solution.

Fuel flow improvements begin directly within the fuel pump module. Entirely bypassing the integrated fuel filter housing, fuel is pumped directly out the top hat of the fuel pump module through a PTFE hose and -6AN bulkhead fitting. Returning fuel is brought in through the original output port and plumbed into the venturi jet-pump system by replacing the original in-tank pressure regulator with our billet regulator delete assembly.

As the internal filter housing has been bypassed, its internal filter can optionally be deleted to make room for the Walbro 450 or 520 fuel pumps, and/or increase surge protection volume inside the fuel pump module.

The S1.E plumbing kit is constructed from stainless braided, black PVC coated, PTFE hose with crimped aluminum hose ends. An Aeromotive inline filter and a CJM "no-drill" filter mount is included standard. Hoses in the engine bay are secured to the firewall with included cushion clamps. A billet aluminum fitting is also included to adapt the regulator output hose to the original fuel feed pipe, re-purposing it as the return line.