Speed's go-kart

Speed's go-kart is a vehicle featured in the 2008 Speed Racer film.

Background
This go-kart was driven by Speed in his childhood. According to concept art by Warren Manser (see in Gallery below), it was visually modeled after the Mach 4.

In the flashback sequence where Speed met Trixie for the first time, he was first seen driving the go-kart through the neighborhood park when he turned his head to see her punching another girl for talking bad about him. It was love at first sight. However, his distraction lead him to run into some bushes, causing the go-kart to topple over off-screen.

He was next seen driving the go-kart back home, with Trixie in tow, and pulling up in the garage, where he introduced her to Rex and Pops. Speed then handed a package to Pops, telling him that man told him to give it to him and claiming that he is a big fan. When it was mentioned that the man was driving a '68 Fendersin, Rex then took the package and put an ear in it to hear a ticking sound. Acting fast, Rex then put the package into the go-kart, broke off half of a mop and jammed it onto the gas pedal, and shifted it into reverse as it backed out of the garage before exploding in the middle of the roadway, therefore thwarting an assassination attempt on the Racer family.