The ZZP LNF performance exhaust manifold is an upgrade from the stock cast steel manifold that comes on the Ecotec vehicles. Our manifold design is cast from high quality 304 stainless steel, with precision CNC machined faces. We machined the center scroll divider down to decrease turbo spool time when paired with a open scroll turbo and additionally resolving the common issue of the manifold cracking through the scroll. During our testing we saw several hundred rpm earlier spool on an open scroll turbo with increased boost pressure at the same RPM. We have also thickened the turbo flange to avoid clearance issues previously seen with larger turbos.  This manifold is based around the stock LNF manifold, so you must use the appropriate lines and fittings. Does not fit with LDK/LHU oil and water lines.  Features:  304 cast stainless steel OEM K04 outlet Titanium studs OEM fitment We do not recommend running this manifold on a stock twin scroll K04 turbo or any twin scroll based turbocharger as you will see increased spool time and decreased performance. This manifold is intended for those running our ZFR series or Z54/Z57 turbos.  Fits: LNF 2.0L. LSJ 2.0L,  L61 2.2L, LE5 2.4L, LE9 2.4L, LAP 2.2L with manifold spacer plate. Does not fit N/A or Supercharged cars. Only turbocharged setups.