This is a Apex Seal Spring add-on for the MAZDA RX7 engine.
Original :
https://www.thingiverse.com/thing:3006071
The video of the finished project : https://www.youtube.com/watch?v=O1ecJfzF-9Q
3 x SmartApexSealSpring: Layer:0.15mm Raft:no Support:no Infill:100%
3 x ApexSealSpring: Layer:0.15mm Raft:no Support:no Infill:100%
3 x ApexSealSpringCap: Layer:0.15mm Raft:no Support:no Infill:100%
Look at pictures
More add-ons
https://cults3d.com/fr/collections-de-designs/dancan13f/mazda-rx7-engine-add-ons
The author marked this model as their own original creation. Imported from Thingiverse.