Anyone reworked 35i exhaust to sound like 35iS
- Thread starter Zikim
- Start date
stuartinzg
Active member
Maniac said:
I don't think it's an emissions flap is it? Since once the engine has produced the emissions, it won't make any difference what the exhaust backbox does. It's my understanding it's for less drone/quiet startup. That's why before I changed my exhaust, I disconnected it
The way the exhaust is configured it seems wrapping the internal pipes produces more noise by preventing exhaust gases escaping into the chamber's sound deadening materials. The e92 M3 exhaust mod leaves the material in place and wraps each bend in the pipes to produce progressively more noise. So you can have a 'one pipe' wrap for more noise but not too loud, up to a 'fourpipe' for all hell to break loose. :evil:
The only issue I would be worried about is the 35I being a turbo engine and messing about with back pressures. No idea if this might compromise performance or even damage the engine long term.
The only issue I would be worried about is the 35I being a turbo engine and messing about with back pressures. No idea if this might compromise performance or even damage the engine long term.
