This is the optional header for your driver side on the 1500 / 2500 GM & GMC truck turbo system.  The kit is designed around the factory cast manifold but this is a direct bolt on upgrade which will help the exhaust breathe better than the stock.  This is made from seamless 304ss and extremely durable, 2.5mm wall.

Shipping is $15 to the lower 48 usa states only