{"product_id":"gm-ls-cast-iron-exhaust-manifolds-raw-finish","title":"LS Swap Exhaust Manifolds Natural Cast Finish Multi-Fit 2.25 In. Outlet Gen III, Gen Iv Chevrolet LS Engine Hooker BlackHeart","description":"\u003cp\u003e\u003cb\u003ePart #:\u003c\/b\u003e 8501HKR\u003c\/p\u003e\u003cp\u003eThese Hooker BlackHeart 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. Their contoured design aims the exhaust directly toward the exit port for improved flow.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, quiet operation, and leak-free sealing is desiredPlain as-cast finish for a factory appearanceNickel 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 manifold2 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 desiredCast from Hi-Silicon-Moly Ductile Iron to provide durability and corrosion resistanceTight tuck design provides universal fit for most popular chassis and a clean traditional muscle car appearancePerfect complement to Hooker engine swap mount plates and Holley engine swap oil pansDetails:Bolt size: M8 x 1.25 x 25mmCARB (California) Compliant: NoCollector Diameter: 2.25 inchEmission Code: 8Engine: GM Gen III\/IV (LS)Exhaust Series: HookerFinish: NaturalFlange Style: 2-BoltHeader Finish: NaturalHeader Style: ManifoldMaterial: Cast IronPrimary Tube Dia.: 1-3\/4 inchProduct Type: ManifoldSubframe: StockTube Material: Cast IronType of Component: ManifoldWarning: California Proposition 65\u003c\/p\u003e\u003cp\u003e\u003cb\u003eFeatures:\u003c\/b\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eIntended for GM LS engine swap applications where durability, quiet operation, and leak-free sealing is desired\u003c\/li\u003e\n\u003cli\u003eTight Tuck Design Provides Universal Fit\u003c\/li\u003e\n\u003cli\u003ePlain as-cast finish for a factory appearance\u003c\/li\u003e\n\u003cli\u003eFree-Flowing For Good Performance\u003c\/li\u003e\n\u003cli\u003eNickel plated steel mating flanges included (mating flange fasteners are not included)\u003c\/li\u003e\n\u003cli\u003eCatalytic Converter Efficiency\u003c\/li\u003e\n\u003cli\u003e2.25 inch outlet diameter offers improved flow for maximum performance from a cast iron exhaust manifold\u003c\/li\u003e\n\u003cli\u003eHi-Silicon-Moly Ductile For Durability\u003c\/li\u003e\n\u003cli\u003e2 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\u003c\/li\u003e\n\u003cli\u003eCorrosion Resistant\u003c\/li\u003e\n\u003cli\u003eCast from Hi-Silicon-Moly Ductile Iron to provide durability and corrosion resistance\u003c\/li\u003e\n\u003cli\u003e2 Bolt Exit Flange Configuration\u003c\/li\u003e\n\u003cli\u003eTight tuck design provides universal fit for most popular chassis and a clean traditional muscle car appearance\u003c\/li\u003e\n\u003cli\u003ePerfect Complement To Engine Swap Mount Plates\u003c\/li\u003e\n\u003cli\u003ePerfect complement to Hooker engine swap mount plates and Holley engine swap oil pans\u003c\/li\u003e\n\u003cli\u003ePerfect Complement To Holley Engine Swap Oil Pans\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eHooker Exhaust Manifolds |  1.625 in. Tubing |  2.25 in. Collector |  Hi-Silicon-Moly Ductile Iron |  Natural Finish\u003c\/p\u003e","brand":"Hooker","offers":[{"title":"Default Title","offer_id":51827760136504,"sku":"H00I 8501HKR","price":491.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0970\/4895\/3144\/files\/horsepower-asset-520463-975781-square.webp?v=1774558179","url":"https:\/\/store.motormia.co\/products\/gm-ls-cast-iron-exhaust-manifolds-raw-finish","provider":"MOTORMIA","version":"1.0","type":"link"}