Our 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. ---4-2-1 design to improve low to mid range power ---Great upgrade to improve sound and power of the ST150 ---Direct replacement for the original manifold and downpipe ---Manufactured from highest quality T304 grade stainless steel ---CNC machined flanges for strong, solid support and an accurate fit Compatible with: Ford Fiesta ST150 2.0 2004-2008 models.