Rams Horn Exhaust Manifolds Small Block Chevy. This listing is for a new black ceramic finish rams horn exhaust manifolds. Easy bolt on installation, offers the vintage look and performance you need if you don’t want full length headers. Black ceramic finish comes with what you see in the picture. Fits most small block Chevy applications optimal clearance for angle plug heads, it comes complete with hardware kit. This is for a Pair of manifolds. Port size 1.347″ square and collector size 2.5″. Fantastic product that will impress everyone when you open the hood! Eliminates the old rusted out exhaust manifolds! To prevent any delays with your order you should watch for the following common issues. Addresses that only have a PO Box can cause long delays and almost always result with having to credit/cancel the order in the end. If the ord er requires multiple packages someone will need to sign for each one. Some items are not combined due to size or weight such as crankshafts, torque converters, radiators, cylinder heads, etc. Powered by SixBit’s eCommerce Solution.