Originally Posted by Transfer
Do you understand the general reason some cars have multiple exhaust exits, and why a 2.0 4cyl is not one of them? It's not about sound or looks although that usually follows when you have a car that actually should have 2-4 exits.
Care to explain the "general reason" cars have multiple exhaust exits?
E36 M3 and E34 M5 both have dual tip exhausts from 6 cyl engines
E46 M3 have quad tip exhaust from 6 cyl engine
E60 4 cyl engines have single tip (oval) exhaust
F10 4 cyl engines have dual tip exhaust
The following pictures shows different cars that all have a double exhaust system
, independently of engine configuration (V or Inline - 4 or 6 cyl).
E36 M3 exhaust system:
E46 M3 exhaust system:
E30 M3 exhaust system (4 cyl engine):
Ford Sierra Cosworth (2l Turbo 4cyl engine):
Koenigsegg have just one exhaust outlet:
4 cylinder cars with multiple exhaust tips:
Vauxhall Astra VXR (2l Turbo):
Golf GTI (2l Turbo 4 cyl):
Passat Alltrack (2l Diesel):
Ford Mondeo TDCi (2l Diesel):
As far as I can see, multiple exhaust tips are used mostly for appearance, and in some cases to get enough flow capacity.
In the future I suspect we will see 4 cyl M cars again (E30 M3 was 4 cyl) and I won't bet against them having the now mandatory quad exhaust tip.