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Discussion Starter #1
Is there much of a difference between these two manifolds? It will be for my daily driven 85GT. The reason I ask is because emissions testing might become a reality next year or the next and I want to make sure I can pass a visual inspection. The second link says it has EGR, but the powerband is only to 6000 instead of the 6800 that the 8020 has. Is that something I don't need to worry about? I don't plan on spinning at past 6k anyways, but I don't want the street legal one to say 6k and choke at 5k or so. The stocker seems to do this and I don't like it.

This is the one I'm used to seeing
http://www.holley.com/HiOctn/ProdLine/Products/AMS/AMSM/8020.html

Street legal version
http://www.holley.com/HiOctn/ProdLine/Products/AMS/AMSM/8311.html

Any info/opinions would be greatly appreciated,
-Brad
 

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The 8311 is a "low rise" intake design made to replace the stock manifold and keep the EGR functioning.

The 8020 is a "high rise" design and is considered an off road design with no EGR provisions.

The 8020 would out perform the 8311 because of the different designs and the 8020 wont have hot exhaust gases running through it like the 8311. But either will easily outperform the stock 85 intake.:D
 

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Discussion Starter #3
Ah ok, thanks for the input. Seeing as both should be better than the stocker, would one show much more of a gain than the other? I'm beginning to think the 8311 might be a nice compromise of performance and legality, but if the 8020 is that much better I might as well just go with that one.
 
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