I brought my car from MS, needed this part since it cracked on me over there, and needed to pass smog. It had a lil soot in it, just cleaned it myself and slapped it on. Price is way better than dealer so that s always a win. Delivery was on point. PS. I have a Jackson racing manifold CA approved, didn t have a heat shield or all that so maybe that s why it was easier for me. Uninstalling the coil pack for the sparkplug wires will give you enough room. Thanks!