Talk:Mercedes-Benz SLS AMG Coupé Black Series (upgrades)/@comment-37113484-20181017142559/@comment-34918040-20181019120026

Just have a look at the Boxes section of the R&D page. If I have calculated it right, the maximum you can get is 8 FI-V8 engines. And it's quite improbable that you get the last boxes without investing some of the engines to get there.