The Fully Cowled Mini 4WD (フルカウルミニ四駆, Furukauru Mini Yonku) series is a line-up of Mini 4WD cars introduced by Tamiya on September 7, 1994.

The main feature of the cars from this line-up is that they have a fully cowled body shell, which also covers the wheels, creating the low drag design.

With the exceptions of the Beat-Magnum series and Buster-Sonic, most cars featured in this line-up were equipped with small-diameter wheels by default.

The Bakusou Kyoudai Let's & Go! series, including the ongoing Bakusou Kyoudai Let's & Go! Return Racers! manga, featuring cars from this line-up.

All Mini 4WD cars featured in this line-up were designed by Testsuhiro Koshita, the manga author of the Let's & Go! series.