Another German tuner enhancing another German car, this time we’re talking about the Audi S5 Cabrio by HS Motorsport.
The main highlight is as you probably expected, the increased engine performance, which has been raised from 333 HP and 440 Nm of torque to 375 HP and 525 Nm. This means the Audi S5 Cabrio by HS Motorsport can now reach a top speed of 290 Km/h and even though it was not specified, an ECU remap was responsible for the additional horses.
Other modification featured by the Audi S5 Cabrio by HS Motorsport include an exhaust silencer with 89 mm exhaust tips from Cargraphic, 21 inch wheels with tires size 255/30ZR21 at the front and 295/25ZR21 at the rear, plus a Bilstein suspension.
By demand the Audi S5 Cabrio by HS Motorsport can also come fitted with an upgraded brake system from Brembo with 380×32 mm brake disks and 6-piston monoblock saddles at the front.
HS Motorsport press release :
HS Motorsport – Audi S5 Cabrio ->  The Perfectionized Perfection
The customers fairly expect over and over again something extraordinary from the HS Motorsport company from Eching, located near Munich, the more so the perfection for a valuable client is the highest precept for Bavaria’s tuner. This time Audi S5 must be exposed to intensive care of the team from Eching.
Strictly speaking, the external look of the cabriolet from Ingolstadt doesn’t need any upgrades. Therefore, the crew begins with the engine output increase which is not visible at first glance. This results in the fact that substantial 375 HP instead of standard 333 HP are now waiting for calling. The maximum torque shows 525 Nm in comparison to initial 440 Nm, which is now blasting the crankshaft without mercy. Increasing the limit of Vmax to the new value of 290 km/h is just a logical way at such performance.
Nevertheless, modifications are visible now! An exhaust silencer from Cargraphic with four round inclined rolled-in 89 mm exhaust pipes announces soon arrival of the Audi S5 Cabrio like a post-horn did in its time. At the present moment, there is only one version assigned for export. A tested version is being prepared for Germany.
Wheel disks at the front axle in 9×21 inch with 255/30ZR21 tyres and in 10,5×21 inch with 295/25ZR21 tyres at the rear axle are produced by Cargraphic also. Use of Bilstein thread suspension B16 PSS10 ensures perfect match of the wheel/tyre combination to the wheel housings.
On demand – and at this performance absolutely advisable – a brake system from Brembo with double 380×32 mm brake disks and 6-piston monoblock saddle for the front axle can be installed. In conclusion, various carbon parts for the external cover and also for the interior should be mentioned.

Source: HS Motorsport