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K Stubbs · 11-26-2011, 05:49 PM

I believe the 292 head was available as a production head with straight plugs, which is different from the "turbo" head with angle plugs. The turbo head was not a production head and was originally designed to be used on a turbo indy car engine but was never used, hence the name "turbo" head.

11-26-2011, 05:49 PM	#13
K Stubbs Member Join Date: Aug 2008 Location: Benton, Arkansas Posts: 402 Likes: 0 Liked 20 Times in 3 Posts	Re: SS/JA - What heads are legal? I believe the 292 head was available as a production head with straight plugs, which is different from the "turbo" head with angle plugs. The turbo head was not a production head and was originally designed to be used on a turbo indy car engine but was never used, hence the name "turbo" head.