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Adger Smith · 01-20-2022, 09:15 PM

Those factory cast iron header/manifolds are not to shabby. A few years ago when I was doing Tech at Engine Masters Challenge one of the participants made some respectable pulls with a 406. He changed from his tube headers to a set of the shorty 427 Ford cast iron manifolds/headers. His power didn't fall off that much (6500 RPM limit) and the Tq actually went up at a lower RPM. Pretty good design for back in the day...

01-20-2022, 09:15 PM	#8
Adger Smith VIP Member Join Date: Dec 2001 Location: Texarkana Ark/TX Posts: 2,446 Likes: 575 Liked 880 Times in 311 Posts	Re: Cast Iron manifolds on Super Stock cars Those factory cast iron header/manifolds are not to shabby. A few years ago when I was doing Tech at Engine Masters Challenge one of the participants made some respectable pulls with a 406. He changed from his tube headers to a set of the shorty 427 Ford cast iron manifolds/headers. His power didn't fall off that much (6500 RPM limit) and the Tq actually went up at a lower RPM. Pretty good design for back in the day... __________________ Adger Smith (Former SS)