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stock intake manifolds any good?


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I've got a request for the dyno gurus out there. I would like to know what the performance increase would be from removing the stock 305 Camaro aluminum intake manifold, and replacing it with an aftermarket one. Let's say, an Edelbrock Performer. The engine is bone stock and very mild, with no mods except for a slightly stronger RV camshaft.

 

Last night I had a discussion with a friend who said that the stock GM intake was as good as anything available on the market up to 5,500 RPM or so. I looked all over the web for dyno charts to prove/disprove this, but I came up empty.

 

Most folks seem to replace a bunch of parts between dyno runs, so it's tough to pin down how much horsepower each mod is good for.

 

Thanks,

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