As per the regulations, the Group 4 car was based around the road car's steel monocoque chassis. The double wishbone suspension was substantially modified and Koni adjustable shocks were used in order to improve handling at the track and make room for wider Campagnolo wheels and tyres. Bigger ventilated brakes supplied by Girling and a quick ratio steering rack were used to refine handling and stopping power. The standard steel body shell of the Pantera also received modifications such as aluminium doors, front lid and engine cover along with flared fibre glass wheel arches in order to accommodate the wide wheels and tyres. Plexi glass windows were used throughout and holes were cut into the chassis where possible in order to reduce weight. The car had no front or rear bumpers and a front deep chin spoiler. It also didn't have any rustproofing and interior amenities. The interior was fitted with a cut-off switch instead of a radio, light weight cloth bucket racing seats, a vinyl trim, a roll-cage and drilled aluminium pedals. The final car had a weight of .