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smallblock header sizing for NOS

1946 Views 24 Replies 15 Participants Last post by  Eric David Bru
any one seen gains by putting larger tubes on their motor? I have 17/8 on mine. its a big inch23 degree small block on 2 foggers im going to 2inch or possibly 2 1/8any input appreciated
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i have wondered about sizing as well, have 1 7/8 x 3.5 now...gonna try 2x 2 1/8 x 4 on my 382 nitouis sbf. What about the tune up...would it change any?
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