The tuners from NOVITEC ROSSO have added a little extra performance as well as a few visual enhancements to the Alfa Romeo Giulietta.
The first thing to catch the viewers eye are the 20 inch multispoke design wheels available in silver or matte-black finish, wrapped in Pirelli P Zero tires (size 8.5Jx20 with 235/50 R 20) which highlight the aerodynamic-enhancement package comprising of a centrally mounted cup spoiler, spoiler corners, side skirts and custom rear diffuser.
The NOVITEC Alfa Romeo Giulietta has also been equipped with a sport muffler with various tailpipe variants (two of four pipe designs), plus new sport springs which lower the centre of gravity by 35 mm. Alternatively, the tuner offers a stainless-steel coil-over suspension with adjustable ride height and
damper rates which can lower the car by 35 to 75 millimeters. 
Moving on to extra added performance, NOVITEC has approached both the gasoline and diesel powered versions, offering the POWERJET 2 tuning modules which enable the 1.4 TB 16V model to produce 141 HP (104 kW) instead of 120 HP (88 kW) and the MultiAir engine with identical displacement to jump from 170 HP (125 kW) to 195 HP (141 kW).
NOVITEC has also boosted performance on the 1.8-lire turbocharged engine powering the Alfa Romeo Giulietta. The results are 261 HP (192 kW) and 386 Nm of torque and a new 0 to 100 Km/h acceleration time of 6.5 seconds (top speed 251 Km/h).
As for the diesel plants, the 1.6 JTD 16V model received an extra 15 HP (11 kW) thanks to the POWERRAIL 5 module, while the 2.0 JTD 16V unleashes an extra 20 HP (14.7 kW).
The 170 HP diesel model has also been optimised an increased to 195 HP (143 kW) and 400 Nm of torque. 

Source: NOVITEC ROSSO