S4 vs S5 Internals
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S4 vs S5 Internals
My question is about the internals of S4 and S5 engines. I already know all of the external differences. Are there differences in S4 and S5 rotor housings. Or ecentric shafts? I know the rotors have slightly different compression rotors but besides that are their any differences with the engine internals as far as interchangability goes?