Mercedes CLA 45 AMG has received a B&B three-stage performance upgrade program. The result is substantial power increase from the standard 360 hp (265 kW) to 450 hp (331 kW) and a peak torque boost from 450 Nm (332 lb-ft) to 580 Nm (428 lb-ft). The first update for the CLA 45 AMG starts with a Stage 1 ECU remapping and includes revised fuel, ignition and turbo boost curves. In this stage the power and torque are raised to 400 hp (294 kW) and 510 Nm (376 lb-ft).
Stage 2 steps on the first one, adds air intake system with improved ram effect, and the B&B exhaust downpipe for reduced exhaust back-pressure and exhaust gas temperature. The ECU mapping is optimized, thus making this Mercedes capable of 425 hp (313 kW) and 540 Nm (399 lb-ft) of torque.
The ultimate conversion stage is the third one. It is centered on a bespoke turbocharger, enhanced cold air intake system and exhaust downpipe from Stage. There is also a bespoke ECU mapping which suits the new hardware. As a result we get 450 hp (331 kW) with 580 Nm (428 lb-ft) of torque.
In this tuned CLA 45 AMG jointed Racing Motor’s “World’s Fastest Sedan”, it would probably beat the Dodge. The stopwatch would witnesses a 0-100 km/h sprint in spectacular 3.8 seconds (instead of standard 4.6 seconds). The 0-200 km/h time is reduced from 17.1 to 14.3 seconds.
B&B also removed the 250 km/h top speed limiter. Thus, Stage 3 allows 296 km/h, and together with the improved sprinting ability, gives the luxury supercar performance without compromising.
B&B also added a high-efficiency oil cooling system, which uses the factory temperature thermostat and keeps engine’s life by giving lubricant from overheating in hard driving conditions. In addition, B&B exhaust downpipe sits between the turbocharger and exhaust system. It helps reduce backpressure and exhaust gas temperature, thus making it easing thermal stress on the engine, releasing an additional 15 kW/20 hp with no other modifications.
The cars stance and handling are lowered via the use of B&B sport spring set, which lowers the ride height by 30 and 25 mm at the front and rear respectively. On the other hand, the coil-over suspension kit for the CLA 45 AMG, allows the cars ride height and damper bounce and rebound to be set independently for road or track driving.
At last B&B needed something to balance the increased performance. They added a six-piston high performance brake system and B&B 8.5Jx20-inch alloy wheels wrapped in 235/30ZR20 tyres.
Source: B&B Automobiltechnik
The production version of the 
At the official Facebook page of Mercedes-AMG was just revealed a unique vehicle – the Mercedes-Benz CLA 45 AMG Racing Series. Not many details have been revealed so far, however it is visible that the car has the authentic racing attributes, competitive technology and spectacular design.
