With increased rib support and enhanced head restraint foaming, the new RT4200 Series utilizes the widely-respected RT4100 shell geometry but makes improvements in the areas of comfort and safety. The RT4200 is closer in feel through the rib and torso area to our retired RT4009HR Series. Racetech signature features such as back-mounting, pronounced thigh support, a molded base cushion, parallel sides, and flush bosses for ease of mounting are all present, making this seat series hard to beat. Like all Racetech seats, these lightweight, resin-infused shells are crafted in Wellington, New Zealand. The RT4200 series comprises three sizes all with FIA 8855-1999 approval. For larger drivers, the RT4200THR is 60mm taller and the RT4200WTHR is both 60mm taller and 40mm wider. The 4200 Series seats use Racetech RTB1009M aluminum or RTB2009S steel side mount brackets.