Brand New Southwest Speed LS Swap Exhaust Manifolds, Natural Cast Finish, 1.75" Primary Tubes, 2.25" Collectors, Compatible with GМ Small Block Gen III & IV Engines (Part #440-2002). These Southwest Speed cast iron exhaust manifolds have a 2.25" outlet, natural cast finish & are designed to hug close to the engine block so they fit into a wide variety of replacement & engine-swap applications. Cast iron provides years of leak-free performance with less under hood noise. Shorty design means you can route exhaust tubing close to your frame/floor pan for max ground clearance. Features: For GМ LS engine swap applications where durability & leak-free sealing is desired 304 stainless steel mating flanges included (mating flange fasteners are not included) 2.25" outlet diameter offers improved flow for max performance from cast iron exhaust manifold 2 bolt exit flange config matches the E-rod exhaust manifolds for a factory like fitment - Allows use of OE gaskets & fasteners for an OE quality seal & fitment Cast from Hi-Sіlіcon-Moly Ductile Iron to provide durability & corrosion resistance Tight tuck design provides universal fit for most popular chassis Specs: Application: Multi-fit Bolt Size: M8 x 1.25 x 25mm Collector Diameter: 2.25" Engine: GМ Small Block Gen III & IV (LS Based) Header Finish: Natural Cast Primary Tube Diameter: 1-3/4" Product Type: Manifold Subframe: Stock You can view and download the complete assembly instruction booklets for these exhaust manifolds here.
