Quote:
Originally Posted by FireSale
This is from my copy of the 2017 book. It's the Modified Stock section. Modified doesn't mention the dry sump part.
"OIL PUMP
External single-stage oil pump permitted.
OIL SYSTEM
Dry-sump system allowed in ES, FS, and GS."
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I believe you are correct. SS/ ES, FS and GS are 4 cyl. engines only.