exhaust

[beemer123]

Can a m3 exhaust be fitted on a 2003 330i ?
Thanks

 

[creature]

the entire exhaust or just the back box?

 

[beemer123]

hi,
The back 4 pipe back box
Thanks

 

[creature]

i believe the pipes on the 330i are 1 3/4" and the m3s are 1 1/4", you can buy a piece of pipe to reduce the size of the exhaust system and then the back box should be able to fit easily.

 

[beemer123]

i believe the pipes on the 330i are 1 3/4" and the m3s are 1 1/4", you can buy a piece of pipe to reduce the size of the exhaust system and then the back box should be able to fit easily.

Thank you

 

[obi_waynne]

Use a cone shaped join rather than a step as a step will mess with the airflow

 

[creature]

no problem, welcome to the site by the way

 

[beemer123]

Thanks all

 

[328dan]

i have 328 and was wondering wheater the 320 single pipe exhaust system would fit on it and what would be the out . because i was thinking more back pressure more power .

 

[pgarner]

but too much is worse, with the 2.8 you proberly want less pressure anyway

 

[obi_waynne]

The headers make a bigger difference overall than the full exhaust.

What other mods have you done or are you planning?

 

[328dan]

what difference if it was a 323 single pipe which i guess would be a little bigger .
Not really touched it but lookin around at supercharger kits .

 

[obi_waynne]

A single larger pipe wont make much difference IMHO. Overall size is the deciding factor. A 421 or 422 manifold is best for most applications.