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I have the stock four hole spacer on my car, but i also have another four hole spacer in the garage and the holes are beveled. Is one better than the other?
 

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I have read that the bevels do make a difference. Sorry I don't remember what that difference is. It had something to do with more torque, I think. Of course, I could be totally off though. Sorry.
 

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The most important part of the spacer should be that the four holes align properly with the carb, then you get into questions of thickness. The bevels (assuming that they are on the bottom of the spacer) may help air flow into the intake plenum, but I doubt will noticeably improve performance. If the bevels are on the top of the spacer, then that sounds like it is a universal fit job instead of a spacer tailored to your carb.

Here's a link to a Hot Rod article on spacer theory (just disregard the Chevy references):

http://www.hotrod.com/techarticles/2944/index.html

Matt
 
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