Hooker 8527HKR Cast Iron Exhaust Manifolds D-Port Natural

Compatible with Small Block Chevrolet equipped with raised D-port Heads;<br><br>Hooker's new cast iron exhaust manifolds offer an increase in performance and visual appearance over stock-style manifolds. Their compact design fit into a wide variety of replacement and engine swap applications. This means you get the traditional look and easy fitment of a stock style exhaust manifold but now with a smoother, cleaner appearance, plus more modern features. These manifolds are cast out of high silicon-molybdenum ductile iron for high temperature strength and better resistance to oxidation and cracking. Internally these manifolds have a larger than stock 1-5/8 inch cross-sectional area and 2-1/2 inch outlets for better air flow and improved performance. These are for raised D-port heads, rectangular versions are also available. These manifolds are compatible with many popular GM applications including standard straight, Vortec straight and angled plug head designs. These are in a natural cast-iron finish, but silver, black, and titanium ceramic coated versions are also available. Gaskets and hardware are included, along with weld-on flanges to aid in downpipe installation.<br><br>These cast exhaust manifolds have been designed to fit into a wide variety of replacement and engine-swap applications, with final outlet connections to be fabricated by the installer. The manifolds will not directly bolt onto factory downpipes.<br><br>Does not fit 1967-1969 Camaro/Firebird.;

• A smoother, cleaner appearance compared to original exhaust manifolds, while maintaining a orginial style look and feel
• Made from high silicon-molybdenum ductile iron for high temperature strength plus resistance to oxidation and cracking.
• Designed with a larger 1-5/8" cross-sectional area and 2-1/2" outlets for better air flow and increased performance.
• Accommodates standard straight, Vortec straight and angled plug head designs for better application coverage.
• Includes weld-on flanges, mounting hardware and gaskets for inlet and outlet flanges