304 exhaust manifold options - JeepForum.com
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post #1 of 4 Old 10-15-2021, 12:53 PM Thread Starter
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1975 CJ5 
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304 exhaust manifold options

When I got my 75 CJ5 it came with fenderwell headers. As much as I like the sound of a V8 with headers, they are not good for trail use. I'm sure I will bounce a log or rock off of the header, collector or muffler at some point. I have 2 options, either block hugger style headers or stock cast iron. Is there such a thing as hi flow stock manifolds? Anyone in the NW have some?


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post #2 of 4 Old 10-15-2021, 01:23 PM
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I used stock cast iron exhaust manifolds on my 360. I've read they flow pretty well.

My exhaust guy also had a creative way to get the crossover tucked above the frame, instead of crossing below it like the stock configuration.

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post #3 of 4 Old 10-15-2021, 07:23 PM
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I agree with Matt. For anything under 3500RPM's, stock manifolds will flow as well (if not better) than headers. You also eliminate all the heat, leaks, rust, and noise of headers. You still can run duals if you feel the need or up the diameter of the single pipe to increase flow.

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post #4 of 4 Old 10-15-2021, 11:51 PM
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Check out Waldron's for complete OEM type exhaust system from Y-Pipe back to tailpipe:


For exhaust headers that exit in the stock locations (shorty headers) see here:


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