Review on ECCPP Exhaust Manifolds HDSHC01EX - Direct Replacement for 2001-2005 Honda Civic EX with 1.7L D17A2 Engine, 4 Cylinder by Alex Taylor

Nice at first, but there are problems. The O2 connector will be placed where the cooling fan will be destroyed or 02 will be. The second issue is the design of the sealing area where the O-ring is inserted. There's no way it won't leak, especially if you hook it up to the eccpp downpipe that hits the oil pan before it's tight enough not to leak. The o-ring on the manifold where the o-ring is located must be wider than the inner diameter of the seal, insufficient surface area. Instead, the seal will shift and leak without being able to keep it centered. So be prepared to fight a lot against it.