1969 Chevelle 325HP

[Alan Roehrich]

Originally Posted by Chipper Chapman

From the 2021 book

“OIL PAN
OEM or NHRA-accepted aftermarket replacement oil pan permitted, Windage trays and/or baffles permitted. Modifications of any kind prohibited.”

It seems to me sending a pan out to have modifications made may not be in accordance with the rule

You may modify it internally. You may not modify it externally, such as to lower, lengthen, or widen the sump, or otherwise expand it.


The addition of baffles, trays, scrapers, etc, is legal.