NoPistons -Mazda Rx7 & Rx8 Rotary Forum

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- - S4 Vs. S5 Block (https://www.nopistons.com/2nd-generation-specific-17/s4-vs-s5-block-45049/)

EMac	02-19-2005 10:53 AM

Is there any way to tell the difference between a s4 and s5 block without taking it apart?

j9fd3s

02-19-2005 11:49 AM

yep

s5 has knock sensor holes above the trailing spark plugs

s5 also has a 3 bolt metering pump

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