Here is a shot of the inside of the collector. Notice it is completely sanded to remove any burrs or boogers for really nice flow.
Can you imagine anyone lining up a 2 inch collector in the MIDDLE of this
Remember, EACH of those tubes in the 4 into 1 collector are 2 inches in diameter! There is simply NO exhaust coming out of the middle of the collector. I can't believe anyone could even sell that with a straight face.
You would not believe the things we have seen.