Designed by Yoshi Suzuka and Trevor Harris, the P35 bore little resemblance to NPTI's GTP cars given the very different regulations as well as differing airflow requirements that needed to be taken into account. The water radiator was placed in the nose with inlets for brake cooling situated there as well, the engine inlet was placed above the cockpit. The side ducts located in the horizontal face of the side pods took air to the oil coolers (and also had a unique boundary layer suction feature). A low rear wing was also used, although a dual rear wing was briefly tested. The chassis of the P35 was intended to be built from carbon fibre, yet the initial test chassis were built from a hybrid of aluminium and carbon to save time, due to NPTI's lack of experience with building carbon chassis.