what is different for RS2 and S2 downpipe

[fridtjov-audirs2]

what is different for RS2 and S2 aby downpipe?

[AndyP]

S2 is 2.5", RS2 is 2.75"

[Gazmitchell]

Hmm ,so how is RS2 turbo plug and play ? As it won't fit on an S2 downpipe then ? Or am I missing something..?

[simon20vq]

Will fit just smaller bore DP on s2 but flanges all the same.

[rxl]

and what about 3b and aby`???

[AndyP]

and what about 3b and aby`???

Both are 2.5" but the 3B only has one CAT and the ABY has two so it splits into two at the end of the downpipe.

[rxl]

Nah 3b has 2

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[Gazmitchell]

Will fit just smaller bore DP on s2 but flanges all the same.

Ah ok cool. So in theory, if I'm Rs2ing my ABY then be better to get RS2 sized downpipe ?

[AndyP]

OK, you are right, long time since I've had a std exhaust! But the split is built into the downpipe on the ABY, the 3B is a seperate part.

[rxl]

I think the location of the cats are not the same on Aby and 3b. So if you put an rs2 downpipe on 3b the cats will not bolt on.

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[simon20vq]

and what about 3b and aby`???

My mistake it must be my age!

[macspring]

Ah ok cool. So in theory, if I'm Rs2ing my ABY then be better to get RS2 sized downpipe ?

imho an RS2 / RS2 style downpipe is pretty much an essential item if you're RS2'ing correclty as it will match the RS2 exhaust manifold as per the Porsche engineers' thoughts when they were designing the RS2.

HTH.

Sorry.

[Gazmitchell]

Sure .. I agree , I was more thinking wider less restrictive .?

[M_GORDON]

The ABY DP is around 63mm and the ADU one's around 67mm

I have an ABY and one friend an ADU.
And I compared in the past when bought the Supersprint DP (70mm)
And that is bigger than the ADU's DP