Adjusting Performance for 1957 Bel Air & Thunderbird: Replacement Parts Edition

You read correctly, we can now replace vanilla cars and still use the replacer's original tuning parts.

To accomplish this, I created an add-on for the tuning parts and .meta data.

This requires baba0rum's 57' Thunderbird and 57' Bel Air installed as replacers. The rest of the installation instructions are included.