This is Oil Pan Remix for the LS3 Chevy Engine (https://www.thingiverse.com/thing:1911808).
The features are :
. Replacing factice screws by holes for real screws
. Gaskets
. Dry Sump Connector
. Plugs
. Holes for electric components

My finished project : https://www.thingiverse.com/make:743429

Printed parts list (14)
1 x OilPan : Layer:0.15mm Raft:no Brim:no Support:yes Infill:15%
2 x OilPanConnector : Layer:0.15mm Raft:no Brim:yes Support:yes Infill:100%
1 x OilPanDrySumpConnector : Layer:0.15mm Raft:no Brim:no Support:no Infill:100%
1 x OilPanDrySumpConnectorGasket : Layer:0.15mm Raft:no Brim:no Support:no Infill:100%
1 x OilPanGasket : Layer:0.15mm Raft:no Brim:no Support:no Infill:100%
1 x OilPanOilFilter : Layer:0.15mm Raft:no Brim:no Support:no Infill:15%
1 x OilPanOilFilterGasket : Layer:0.15mm Raft:no Brim:no Support:no Infill:100%
1 x OilPanPlug1 : Layer:0.15mm Raft:no Brim:no Support:no Infill:100%
1 x OilPanPlug1Gasket : Layer:0.15mm Raft:no Brim:no Support:no Infill:100%
1 x OilPanPlug2 : Layer:0.15mm Raft:no Brim:no Support:yes Infill:100%
1 x OilPanPlug2Gasket : Layer:0.15mm Raft:no Brim:no Support:no Infill:100%
1 x OilPanPlug3 : Layer:0.15mm Raft:no Brim:no Support:yes Infill:100%
1 x OilPanPlug3Gasket : Layer:0.15mm Raft:no Brim:no Support:no Infill:100%

Accessories (31)
6 x 4mmx2mm Disk Magnet
6 x m3x1.5mm SHCS (i have cut m3x3mm to make m3x1.5mm)
12 x m3x3mm SHCS
2 x m3x5mm SHCS
2 x m2x5mm SHCS
2 x female jack : https://www.amazon.fr/Rtengtunn-dalimentation-Ensemble-Connecteur-Adaptateur/dp/B08D9DBXHB/ref=sr_1_9
1 x potentiometer 12v : https://www.amazon.fr/gp/product/B07B9RFGB6/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Assembly
Look at pictures.

More add-ons

https://cults3d.com/fr/collections-de-designs/dancan13f/chevi-ls3-engine-add-ons