The headers are the inauguration of the exhaust piping track, bolted directly to the engine cylinder heads. Adore all components of the exhaust step, headers can be swapped outside for aftermarket units which bestow larger breadth piping. This allows for an increased publication of exhaust flow, which translates to aggrandized horsepower absent of your engine. To maximize gift gains, install headers along with a fully upgraded exhaust step and intake. Comment that installing headers may immensely aggrandizement your vehicle's exhaust publication, expressly when aftermarket mufflers are used.
Secure your aftermarket headers into place by reinstalling the stock exhaust manifold bolts at the cylinder heads and catalytic converters. Reinstall all the stock components you removed to install the headers. Note that modification or disuse of the stock exhaust manifold heat shields is often required for fitting aftermarket headers.
Depending on vehicle fabricate and example, this may append engine covers and exhaust heat shields further as engine under-carriage components.
2. Remove the hex bolts that attach the inventory exhaust manifolds to the cylinder heads. Remove the hex bolts at the inverse ends of the exhaust manifolds that secure them to the catalytic converters. The inventory exhaust manifolds should then lift gratuitous of the engine bay. Sign that it's common for the exhaust manifold gaskets to slightly melt, sealing the manifolds to the cylinder head. If this is the case, use a flathead screwdriver to pry the exhaust manifolds loose.
3. Fit your aftermarket headers in place of the stock exhaust manifolds. Be sure to install new exhaust gaskets onto the headers' cylinder head flanges as well as at the catalytic converter connections. Most aftermarket headers come with replacement gaskets. New exhaust gaskets also can be purchased from most auto parts retailers.
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