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Originally Posted by Phoenix79
Thank you both for the detailed and good advice.
Last question, would either of you know if the Ram Air manifolds hook up to the stock Y-Pipe?
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The RA manifolds definitely will not mate up to the stock Y-pipe.
I would run stock log exhaust manifolds if you must keep the Y-pipe, there’s no good reason to use RA manifolds if you’re not running a free flowing 2-1/4” or 2-1/2” dual exhaust.
On a mild low compression 400 the stock log exhaust are more than capable of handling 300 to 350 hp when coupled with a free flowing dual exhaust. The bang for the buck (probably less than 10 hp) just isn’t there with the RA manifolds.
Not saying the RA manifolds aren’t good, just that there’s probably better things to spend 4 to 5 hundred dollars on when trying to stay within a $3K engine building budget.