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I am down to two intake manifolds for a 2894v with mild cam and cast iron hi-po manifolds. I have an automatic and don't plan on running it very hard if at all. I heaard lots of good things about the performer and the shelby (65-66) style. I now wonder if I would pick up much at all with the performer over the stock. Would I be better off with larger pipes and turbo-max mufflers??#$#?? Any experience in this area would be of great help. Thanks
 

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I currently have the performer on my 289 and I really like it. The performance increase was certainly noticable over the stock cast iron intake not mention the weight savings. I don't drive the car hard though, but for the usual cruising I don't think you can go wrong. Unfortunately I have no experience with the other manifold. Just my two cents worth.
 
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The Edelbrock Performer design is a copy of the Shelby style intake. It's a good around town, stock type piece of gear. I installed the Performer RPM intake. It kicks performance up a notch (by opening up the top end) without sacrificing low end torque for daily driving. Either will work fine with your Hi-Po exhaust.

For the rest of the exhaust. If you are currently running duals, then the larger pipes and fancy mufflers won't buy you anything else but a different sound unless you install headers. Regardless of whether you keep the Hi-Po exhaust manifold or get headers, don't put in pipes any bigger than 2-1/2". The 289 just isn't big enough to use a larger pipe, and your around town driving will suffer.

Good luck.
 
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I forgot to mention the weight savings with the Edelbrock intake. Not sure about the Hi-Po intake, but my stock intake was iron. The Edelbrock's are aluminum - your back will notice the difference when you install it.
 
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