This page contains CSR Classics Hints for iPhone - iPod called "Upgrading Nitrous" and has been posted or updated on Oct 19, 2013 by DennyFco. Let us know what you think of this Hint by thumbs voting.
The best car upgrade you can start with is upgrading your "Nitrous" This will provide you a boost in every race you take the automobile into, this way you have a higher chance to win the race and may not lose your gas token..
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