Thank you for the 411 ...
Quote:
Originally Posted by Boss330
The Akrapovic EC-type approval document refers to the EC-directive covering noise.
This can be found via the EC-type approval number:
e24*70/157*2007/34*1615*00
e24: "e" refers to an approval made under EC legislation as opposed to a "E" which would refer to a UN ECE legislation 24: 24 refers to the european country issuing the EC-type approval, in this case Ireland (1 is Germany) 70/157: The number of the EC directive the type approval is issued after. These directives are technical legislation similar to FMVSS legislation. 70/157 is the directive regulating noise levels from automobiles. 70 relating to 1970 and 157 being the number in the line of directives issued that year. 2007/34: Refers to which amendment/update of the basic directive this approval is done according to. This then being an update from 2007 and the 34th amendment (total number, not directive specific) being issued that year. 1615: Approval number. 00: Extension number. Say Akrapovic makes a new muffler, Y-pipe or similar, a new test is done and that kit would normally then get extension number 01. So, the Akrapovic exhaust complies with EC-legislation regarding noise. For passenger vehicles with engines over 150kW this means it can't exceed 80dbA during acceleration (measured under specific provisions).
So, not a straight through exhaust at all. The dyno numbers are probably even more impressive (+10hp) since the Akrapovic has been manufactured to comply with stringent noise regulation.
EC legislation for motor vehicles can be found here: http://ec.europa.eu/enterprise/secto...s/index_en.htm |