Is a Single 3" just as good as a twin on a RS2 450bhp?

[UUUdirs2newcastle]

Is getting rid of the Twin Cats and twin pipes in favour of a full single 3" from the downpipe back ok?

[Jamo]

Yes optimal setup IMO and what I have

[A80Avant]

should be sufficient.

having 2 cats and 2 pipes can give more i think. Ask the guys at aas,as they are quite knowledgable.

[Jamo]

2 pipes flowing more is a myth, Pipewerx confirmed this when I had mine done, the main advantage of twin pipes is ground clearance

[Bram]

Yes optimal setup IMO and what I have

fully agree

[smiler]

Is 3" enough for 6-700hp?

[Jamo]

Is 3" enough for 6-700hp?

Would say you need a 3.5" or 4" downpipe

[GazzaG60]

jamo is correct. the 2 cat setup is for clearance and flow. without the cat being too big that it catches.

wrc uses 2 IIRC.

[A80Avant]

i like clearance!!!!

[Audi-Porsche Avant RS2]

Hello, so a single 3" downpipe with only one cat is better that rs2 downpipe with 2 RS2 cats? Also without cats is the same?
Thanks!
Alessio

[Keeper of The Kitten]

Partly this is due to the split from one pipe into two pipes being less efficient than people may realise ...a single large pipe willl flow effectively without the associated turbulence at any split into two pipes. The split pipe system is a manufacturing compromise as stated above. Even better when you don't need any cats at all

[Audi-Porsche Avant RS2]

So Audi had used to put two pipes in one pipe only for put two cats because with one cat years ago they wasn't able to have the correct flow?
Is this possible?
Thanks!
Alessio

[Thuppu]

What would be the max. hp with 3,5" DP and 3" pipe with no cat?