Following the sucess of our upper intake manifolds, we've not almost finished the FD3S lower intake manifolds( sideport 4 injector, and semi pport 6 injector models). We have quite a few out in the field being setup for back to back dyno tests by third parties, including one against a competitors unit. All of our lower intake manifolds come with secondary fuel rails, as we've changed the injector location instead of just mimicking the factory. We've previously seen quite a power jump by changing injector fuel flow vs port velocity, this is the number one reason we've added more injector slots. We've gone to great lengths to make this unit better from every angle compared to the factory models. We've got about 200 of these units in machining now, just making some last minute tweaks. FC3S & 20B models are up next.

https://turbosource.com/products/tur...ntake-manifold



Semi pport FD model


O-ring'd with retainers

FD3S installation ( sideport, 4 injector)