The EURO4 KessTech sound – what's different and why?

The EURO4 KessTech Sound has been available and deliverable since 23.03.2017. A lot has changed and some things have changed. In one Youtube Film has KessTech the major differences between a EURO3 and a EURO4 KessTech exhaust system explained YouTube. This short film also explains that, in order to comply with all legal requirements, the EURO4 exhaust system must maintain certain noise levels in every gear within specific speed ranges.

Here is a little more background information on why this is the case and why it is unavoidable. Due to so-called additional Sound Emission Provisions („ASEP“), which are part of European legislation and are now also applicable to accessory manufacturers of Exhaust systems apply, all accessory exhaust systems with a European type approval must meet the requirements of the ASEP.

The requirements set out in the ASEP stipulate that noise levels must be maintained in all gears within certain speed ranges without exception. The KessTech development team spent weeks developing the CAN-BUS controlled Exhaust system accordingly so that it complies with the required noise values. If an exhaust system does not comply with the noise values required by the ASEP, it does not meet the legal requirements.

And that is the reason why the KessTech exhaust system automatically closes in certain speed ranges in all gears. Closing the exhaust system in only one or two gears (as was previously the case) would not be sufficient. ASEP would not be met, as the manufacturer must guarantee compliance with noise levels in all gears and not just at one or more ASEP reference points to the approval authorities.

The exhaust system would be illegal. Since the guys and girls at KessTech always try to see things from the customer's perspective, and standing still would mean falling behind, the development team is already working on further innovations that are to be introduced in the course of the year.

You can already look forward to it!