William Winckler assisted in the design of the Speed Racer die - cast cars , coming up with the concept of attachable parts , buzz saws , auto jacks , etc. , to the Mach 5 vehicle .
Tom Lowe incorporated William Winckler 's ideas into the product line .
William Winckler assisted in the design of the Speed Racer die - cast cars , coming up with the concept of attachable parts , buzz saws , auto jacks , etc. , to the Mach 5 vehicle , and Tom Lowe incorporated Winckler 's ideas into the product line .