Decat Exhaust Manifold – BMW 3 Series E90 E91 318i 320i N46 05-07

Gravity Performance manifolds are designed to be direct replacements for OEM manifolds, ensuring smooth installation every time. Our manifolds improve the collection of gasses from the cylinder heads, before routing them through them to the rest of the system. Manufactured from highest quality T304 grade stainless steel Mandrel bent and fully TIG welded for strength and durability CNC machined flanges for strong, solid support and an accurate fit 4-1 design for maximum gains at the top end of the rev range Direct replacement with both gaskets included