Nanufacture of this stacked injection ?

[razerwire]

To me , for what its worth, the manifold looks different than any of the T.W.M. manifolds that I have. If you go to current Borla site it looks different than newest one. I have one of the early setups where their is casting between throttle bodies at butterflies and I have two of newer T.W.M. units where the middle casting between throttle bodies has black springs instead of enclosed. All the manifolds have ribs down the center and are really good castings. The manifold pictured is real ruff compared to mine. Fuel rails seam crude also. Just freshened up engine for Bennett car and used oldest manifold with the casting between throttle bodies. Was surprised at the numbers. Engine had original sidewinder intake with reworked carb and made 455 hp. With T.W.M. and set of aluminum heads , now have 658 hp at 6000 rpm. Torque is 523 at 2500 rpm up to 631 at 4700 rpm, and never goes below 514 up to max rpm of 6500. The csx car has had T.W.M. setup since day one and I have had zero problems with it. Just hauled Gene Winfield in parade 3 weeks ago for hour, I admit when I went home the engine seamed happy to have it's barrels opened more than idle. Sorry back to subject, does not look like T.W.M. or newer Borla unit to me.