LS INTO OBS: Fuel System ? Return or Returnless
 

I have a 99 OBS that I am swapping in 6.0/80e

I was told that my 99 OBS has a return style fuel system.
The L92 Intake manifold is set-up for return-less fuel system
I need to convert...
I picked up a set of fuel rails modified to run either return or returnless...
What do I need to do to make this happen?

Just take your corvette filter and turn it around. Run 1 fuel line to the intake and the other 2 back to the tank.

So the other in line fuel filter that came originally with the truck is scrap? I see a lot of guys mounting the Vette filter on the intake manifold, why?

The fuel lines go to the fuel rails correct?

I cut mine out, you can keep it if you want.

Probably bc they dont wanna cut their factory lines, only they can answer that.

The 2 fittings (side by side) connect to the factory metal tubing for the tank, the single fitting goes to the driver side of the intake (where the fuel fitting is)

If you are wanting to run a full return system, then you need an aftermarket regulator

Thanks!

Thinking I will keep both fuel filters, diesels run two fuel filters in aftermarket set-ups. I know gas is cleaner but an extra filter can't hurt.

I get what your saying about the fuel filter. So I don't have to modify my fuel rails? Basically the guy who sold me the fuel rails, lied?

it is easier/cheaper to run a returnless style (stock for the L92) so use the stock fuel rail.

no he may not know as much as he thinks he knows?