Cobra Make, Engine: Superformance , Roush 427SR dyno'd at 526 hp
Posts: 173
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Small block headers
What is the difference (s) between 302 and 351W headers? I've been told the 302 header pipes have round inlets to match the heads and the 351W pipes are rectangular .
Length of primary tubes as 351 is "higher" and therefor the headers are different. The ports are the same basically. 302 headers on a 351 will put the collectors a couple inches above where they need to be and vice-versa. They can be modified to work either way with tubing and a welder.
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Small block headers
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