Rather than engine power and absolute speed, the most important consequence of the larger displacement was a marked increase in torque, available at lower engine speeds; the Dino 2400 had much better pickup, and it was found more usable, even in city traffic. Other modifications went on to improve the car's drivability and safety: larger diameter clutch, new dogleg ZF gearbox with revised gear ratios, wider section 205/70VR -14 Pirelli Cinturato CN36 tyres. tyres, and up-sized brake discs and callipers. Cosmetic changes were comparatively minor. Both models were now badged "Dino 2400". On the coupé the previous silver honeycomb grille with the round Fiat logo on its centre had been replaced by a new black grille and a bonnet badge. A host of details were changed from chrome to matte black, namely part of the wheels, the vents on the front wings and the cabin ventilation outlets—the latter moved from next the side windows to the rear window. At the rear there were different tail lights. The spider also sported a new grille with two horizontal chrome bars, 5-bolts instead of knock-off wheels, as well as a new bumpers with rubber strips. Inside only the coupé received an entirely redesigned dashboard and new cloth seats, with optional leather seat upholstery; front seat headrests were standard on the coupé and optional on the spider. Spider and coupé bodies were produced respectively by Pininfarina and Bertone. 2.0-litre and early 2.4-litre cars were assembled by Fiat in Rivalta di Torino. Starting from December 1969 the Fiat Dino was assembled in Maranello on Ferrari's production line, alongside the 246 GT. Between 1966 and 1969 there were 3,670 2.0-litre coupés and 1,163 2.0-litre spiders made; with only 420 built, the 2400 Spider is the rarest of the Fiat's Dinos. Of the total 7,803 Fiat Dino produced, 74% were the popular coupés and only 26% were spiders. The Fiat Dino coupe used an all-steel unibody construction. The Spider had an aluminum trunk lid. The dual-circuit braking system with vacuum servo operated on four wheel disc brakes. The upgraded Girling brakes of the Dino 2400 were shared with sports cars like the De Tomaso Pantera and Lamborghini Miura. Steering was of the worm and roller type by Gemmer (F).