Talk:Research & Development/Mazda RX-8 Special Edition/@comment-1915804-20190111112716/@comment-36014772-20190111182843

scroll up!

" There are 3 free upgrades given in the R&D. (2, 8, 18)
 * Before attempting Test 8, install Top Speed Level 2 and use the free upgrade on Top Speed Level 3 (Token-only upgrade).
 * Before attempting Test 18, install Nitro Level 3 and use the free upgrade on Nitro Level 4 (Token-only upgrade)."