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Same apart from the above . used to run s1 on my s2 just have to block off the water feed and return. Had mine on to lower water temps. but all in all will fit on. no props
s1 manifold sits closer to the block than a s2 as i found out to my misfortune when the s1 manifold hit my zetec block so had to use a s2 which clears the block!