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Chipper Chapman · 08-09-2010, 06:24 PM

I found the runner volumes on the NHRA site and noticed that the 493 has the same volumes as the 993. Any known differences in these heads? They seem to be a bit more common up here, but i've only seen them on 400's.

08-09-2010, 06:24 PM	#4
Chipper Chapman Member Join Date: Jan 2004 Location: Belmont N.S. Canada Posts: 452 Likes: 211 Liked 141 Times in 63 Posts	Re: SBC Heads 993, 882, 0r 624? I found the runner volumes on the NHRA site and noticed that the 493 has the same volumes as the 993. Any known differences in these heads? They seem to be a bit more common up here, but i've only seen them on 400's.