Please help with my Turbo M30!! :)

[yert315]

I would stay with a single pipe exhaust. seeing that you are coming from a rather large downpipe (assuming its at least 3"), why would you want to separate the gas into two separate pipes? Scavenging efficiency of the exhaust decreases. It is better, performance-wise, to maintain a single pipe exhaust - at least 3" in diameter.

[HandalE30]

Thanks alot, I´ll think about doing it like that! but does affect performance if I make a 3¨ downpipe and all the way till I reach the rear subrame and there i separate into 2 tubes of 2.5¨ each?

[yert315]

are you trying to do a dual exit exhaust setup? I suppose it wouldn't hurt

[pegase747]

I guess having a single pipe all the way is the cheapest and most efficient way.

and a last Y at the exit for the dual exhaust will probably not hurt anything being a divergent Y ( 1 to 2 ) , not a convergent ( 2 to 1 ).

That is what i would do, to keep a nice twin exit looking like OEM...

Regards / Pierre