These Flowtech cast iron exhaust manifolds have a 2.25-inch outlet, natural cast finish, and are designed to hug close to the engine block so they fit into a wide variety of replacement and engine-swap applications at a budget-friendly price. Being cast iron means they will provide years of leak-free performance with less under hood noise than traditional headers.

Plus, their shorty design means you can route exhaust tubing close to your frame/floor pan for maximum ground clearance.

• Intended for GM LS engine swap applications where durability and leak-free sealing is desired at a budget-oriented price Nickel plated steel mating flanges included (mating flange fasteners are not included) 2.25 inch outlet diameter offers improved flow for maximum performance from a cast iron exhaust manifold 2 bolt exit flange configuration matches the E-rod exhaust manifolds for a factory like fitment. This allows the use of factory gaskets and fasteners if desired, for an original quality seal and fitment Cast from Hi-Silicon-Moly Ductile Iron to provide durability and corrosion resistance Tight tuck design provides universal fit for most popular chassis and a clean traditional muscle car appearance Available in plain as-cast finish or with black or silver ceramic coatings for reduced engine compartment temps and improved corrosion resistance

• Application: Multi-fit
• Bolt size: M8 x 1.25 x 25mm
• Collector Diameter: 2.25 Inch
• Collector Port Diameter: 2.50 Inch
• Color: Black
• Design: Manifold
• Emission Code: 8
• Engine: GM Gen III/IV (LS)
• Exhaust Manifold Style: Standard Swap
• Finish: Natural
• Gasket Or Seal Included: Yes
• Grade Type: Performance
• Header Style: Manifold
• Heat Shield Included: No
• Material: Cast Iron
• Mounting Hardware Included: Yes
• Mounting Hole Quantity: 6
• Oxygen Sensor Port: No
• Port Shape: Round
• Primary Tube Dia.: 1-3/4 inch
• Primary Tubing Diameter: 1-3/4, 1.750 Inch
• Product Type: Manifold
• Subframe: Stock
• Tube Material: Cast Iron
• Type of Component: Manifold