SMALL BLOCK CHEV STAINLESS STEEL CLIPSTER HEADERS. Brand New Cal Custom Small Block Chev Stainless Steel Clipster Headers. Fits Small Block Chevy. 265, 283, 305, 307, 327, 350, 400 engines. Fits regular (OE style) cylinder heads; do not fit slant plug heads. The header set includes 2 headers, 2 exhaust manifold gaskets, 2 collector gaskets, 1 bolt kit. Minor modifications may be required for fitment on certain models. If your vehicle is using aftermarket components, parts from other applications or custom-altered parts, then it is the installer’s responsibility to verify fitment. Collector adaptor outlet: 2-/1/4.