Phoenix Race Performance Extractor Manifold - TR5-6
This is an extractor manifold designed to scavenge correctly with its long tuned length primary pipes that exit at 90 degrees to the head (others are 45 degrees) for maximum flow. This manifold is designed with serious performance in mind and made in 304 stainless for longevity. You will need collector PXTH6311 which features a slip type race joint to fit with PXS5201 single pipe system, which sounds great but not too noisy during motorway cruising.
We know you won't want to hide your manifold away but wrapping, but it really helps reduce engine bay temperatures by keeping the heat in the exhaust: Heat Insulation - Manifold Wrap.
You can also use PXS5203 for a quieter result, but I think it would miss the point of using this manifold.