H-Gear D-series 4-1 2-piece Header. Constructed from 304 grade Stainless steel. Being a 4-1 configuration means it it gain more in the higher RPM range.
Proper welds, nice fitment and a great HP increase. It may be a low budget manifold, but the quality is very good!
Including bolts, gaskets (head and donut).
Please note: The 4-1 piece is connected with a 3 bolt flange, not with the bolt/band style like in the image.