[shahnny]

Has anyone put dump pipes on the 335i with a IC

And is anyone else in Sydney running the JB3/JB4 with bolt on's

[Stuart@BMRAutowerkes]

downpipes are pretty common? when you say dump are you referring to the small 90degree knuckle coming straight off the turbo?

[woosh]

shahny, there's a few members with bolt-ons and jb3/4. im sure they'd post if you had a more specific question?

bmroxm5: dump / down pipe are the same thing.

[Stuart@BMRAutowerkes]

Perhaps I'm more familiar with other engine setups where you can have a seperate dump and downpipe.

OP - anything more specific?

[woosh]

Yeah terminology around these things can get loose sometimes. And I just remembered they're not entirely the same thing..

OP - do you really want to be dumping exhaust gases into the atmosphere? Cmon it's a 335i, not a 200sx. lol

[Sparky66]

I'm sure OP is talking about downpipes (aka.. dump pipes in OZ) which dump exhaust gasses from the turbo's into the exhaust system.
Nothing rice about replacing your existing downpipes with a better flowing catless set, which produce a solid 25-30hp gain at the wheels. I think some people are confusing the terminology used since they are referred to as "Dump Pipes" and that it's somehow bypassing your exhaust system........which it's not.

[woosh]

I thought the technical name for a screamer pipe was dump pipe? Guess not..

[01 IGY]

Dump pipe refers to the exhaust system that comes directly out from the turbo, usually at a 90 degree turn. From this you then usually have attached a front pipe which joins the dump pipe to the cat converter. Some cars have an all in one dump pipe and front pipe which is then still refered to as a dump pipe.

Americans tend to call front pipes down pipes to my understanding.

Don't think there is any technical term for a screamer pipe other than an atmospheric venting wastegate.

Anyway back on topic.