Quote:
Originally Posted by pgustavson
Gasket-matching has been said to be worth a few HP, but isn't entirely necessary if a stock intake manifold is being used, since the IM ports are same size as the head ports and both are smaller than the gasket openings. If the IM has been ported and its ports match the gasket opening, then the stock head ports leave a sharp corner sticking into the flow. It is recommended to blend that in to match the gasket opening. It isn't a lot of material that gets removed.
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That's great to know !! If I decide to do this my self what should I do to prevent the dust and residue from falling in