It should sound like a f430 and thats a nice sound, what dont you like about it?
ref eml.......
The Akrapovič Evolution Exhaust system for the BMW M3 consists of gas-flow optimised link pipes with 2 x 100 cell sports catalysts and integrated resonators as well as a completely newly developed and now split-end This system is from the manifolds back, and includes the 2x Lambda Extension sockets
(100 cell catalysts inside) to ensure there's no ECU Lights on the dashboard.