How to Install Headers on a 350?

Do you want to install headers all by yourself with some easy processes? If you are, then check out how to install headers on a 350 to get detailed knowledge.

Installing headers is not easy. But it becomes an easy task if you do it with proper knowledge.

That’s the reason you should know what the proper method is. Let’s see what the details of the process are and how to execute it.

How to Install Headers on a 350?

There is a certain method of installing headers. You have to know all about it if you want to do it yourself.

There are many parts of it like engine bays, bolt holes, stock manifolds, rear bolts, header flange, primary tubes, and lots more. You must know all of it first before starting the process. Check out the method step by step to get a better idea.

Step 1: Preparation

Whenever you are going to do something, you need to prepare for it. That’s the reason you do this installation after doing all the preparation first.

To do the method, first, you should do a plan of what you are going to do step by step. Also, take all the equipment beside you before starting the process. It helps you to do the process easily. So, make sure you arrange all the equipment first.

Step 2: Unpacking New Headers

After arranging all the equipment for your vehicle, now you need to do some unpacking. For doing that, first, unpack the new headers that you want to install. Get all the parts out of the package and bring all these things beside you.

That’s how it will be easy to get the necessary equipment when you need it. Also, get all the hardware arranged so that any necessary tools are available when you are going to start the process.

Step 3: Disconnecting Negative Battery Terminal

When you are doing header installation, make sure you disconnect all the negative battery terminals. It helps to avoid any electrical charge that occurs in several ways.

It appears around your engine block. If you don’t disconnect this negative battery terminal, it might get some electrical charge which is dangerous for you if you are doing the installation.

So, make sure you do that. Moreover, unplug the electrical oxygen sensors for safety. Remove the air box too if needed.

Step 4: Unbolting Exhaust Mid-pipe

Now, you should unbolt the exhaust mid-pipe that exists in the stock manifold. Go to the underneath of your car and then do the unbolting. Make sure you fully remove the mid-pipe to ensure ease of installation and a better outcome. Also, if you want to get any access to install the new header, you should unbolt it first.

Step 5: Disconnect All Hardware Equipment

After unbolting, now you should disconnect all hardware equipment to have more safety. The main reason for doing that, it prevents you from not accessing your manifold. So, it will be tough to do this method if the hardware is attached.

Besides, you also need to remove the spark plugs for better service. You can put any alternative to adjust the place. On the other side, you must remember where the connection starts and where to connect it again.

Step 6: Remove Manifold

Unbolt the manifold when you are starting the process. It helps to unbolt from both above and below the area. That’s why you can do the method easier and get a better service.

Besides, it can involve both the passenger and driver’s sides. That’s why you need to unbolt the places too. So, you should remove the manifold first. Also, check if the engine comes together or not. And if it happens, unbolt it from two points.

Step 7: Ensuring Perfect Placement

Now, it’s time to bolt the headers. Take the new set and start the process by checking if there is any adjustment needed or not. Go to the engine compartment with the equipment you need.

After that, take the header to install in the right place. When all the arrangements are done, install your new exhaust header in the right place. Make sure you place the headers in a proper way where needed.

One thing you need to focus on is that the installation of cylinder heads will be from factory studs prior to fastening. This time, you have to attach the headers to the bolts as tight as possible.

Attach the headers in the exhaust system. The cylinders should match well. Also, the installation must be placed well. Check and make sure the lower bolts, middle bolts, and all the other bolts are tight enough. Factory exhaust should also be attached properly.

Step 8: Reattach & Re-install Everything

After completing all the installation processes, check if everything is attached well or not. And when you are done with your job, you need to focus on reattaching everything you disconnected.

Begin with reattaching all the parts, do the same with all the parts, and connect them as before. Place the things where they belong and carefully connect them.

Further, re-install header gaskets and mid-pipe too and attach them to the back end of the manifold. Connect all header bolts well to the right places.

One thing is the main issue and that is the right place. When you are unbolting everything at the beginning of the process, you must remember the places where the parts belong.

Otherwise, when you bolt the parts again, it will be dangerous if you don’t bolt the parts in the right place. To secure the places, you have to maintain that.

Step 9: Connect Battery Terminal

The finishing process is to connect the battery terminal. For doing that, turn the engine on first and then connect the battery terminal.

Several other areas like header install and header collector are also included in this process. Also, the steering shaft and steering column need to be in place.

Listen to the sound of your engine and check if all the fasteners and bolts are tightened properly or not. It lets you know about your security.

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How much horsepower do headers add to a 350?

If you use a usual 350, it can add 350 – 375 HP until you exceed the reliable components. Besides, it can make 400- 475 HP for a big block with the same stock component.

And in this case, it can add up to 500 HP until you exceed the stock cast pistons’ reliability.

Can you install headers yourself?

You can install headers all by yourself. But you might face some difficulty if you have no such knowledge about it. The entire process is not tough but troublesome.

We would recommend you get a specialist to do this job. But if you don’t have any other way, then get proper ideas first to do the installation correctly.

How are headers installed?

To know the quick process of header installation, turn the power steering and other connections off and then start the process. Install headers and attach them fully tight. When you are done installing headers, check it by running the engine properly.

Make the engine hot then shut it down. Attach the header bolts when the engine is still hot. After that, run the car for 200-300 miles to check everything is fine.

When you notice the headers are still hot, tighten the bolts again to make sure all these are well attached.

Can I install headers with stock exhaust?

Using a stock exhaust is not much complicated. You can use it but you need to focus on some points. The first thing you should do is to set your motor mount.

If you are ready with it, you can now install new headers. If you are doing it yourself by using stock exhaust, then you can use this hack for easy installation.

What are the best headers for a 350 small block?

If you want a suitable header for a 350 block, then you need to choose accordingly. In this case, you need a header that has a 1 1/2” to 1 5/8” diameter.

Are headers easy to install?

Yes, headers are easy to install. All you need is proper knowledge about this method. The first thing would be knowing the model of your vehicle.

And according to that, you should install the header. Overall, it is an easy process to do yourself.

How do you attach the header to the exhaust?

To attach the headers to the exhaust, you should take your headers and go underneath the car. Now, attach it to the exhaust system but make sure it is placed up to the engine so that it can set well.

Tightening up the bolts well is enough to have a complete attachment.

How many HP do headers add?

An average quality set of headers can provide 10-20 HP. So, in this case, you need to consider how many sets you need according to the vehicle model.

Where do headers connect to?

Generally, headers connect to the exhaust manifolds. It is present in the first part of the exhaust system. And this is the place headers need to connect.

How much does it cost to install headers?

If you gave headers along with the mid-pipe, then it will cost around $500-$600. But if you don’t have headers and you need to buy a set of new ones, then it will cost more than that.

How do I install a header?

The first thing will be taking the header and holding it towards the exhaust system. You can get help from anything to hold the header while installing it. Now, steadily tighten the header and that will be enough for installing the header all by yourself.

Can headers hurt my engine?

Headers are not responsible for hurting your engine. If the engine is disturbed, there can be other reasons. Headers are used for enhancing performance. So, it is impossible for headers to harm the engine in any way.

Wrap Up

We have tried to give you some detailed information on the header installation method. You can learn a lot by reading this article.

All you should know is how to install headers on a 350 and what the quickest and easiest way of doing it is. Learn all the facts by checking the process that is described step by step.

About Nurul Islam 157 Articles
I am Md Nurul Islam (Jewel), a Professional SEO expert, and a blogger. I am an automotive enthusiast also I started creating this website because I have always loved cars and bikes.