Downpipes

[bops4]

I have a KO4`d S4 B5 with rs4 downpipes and gutted pre cats and also dual milltek system. Would these fit if i have the flanges swapped off my old downopipes, if so would they be of much benefit? I will be getting the car re-mapped in the next few months anyway.
http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... K:MEWAX:IT

[SJS]

No reason why not...did you win them? Cheap price.

[Blue_Thunder]

These were discussed over on AudiSRS.

Basically there is little benefit of fitting these over RS4 pipes with the pre-cats gutted. Certainly not worth swapping the flanges over.

Speak to your tuner if you are unsure, but I would guess you'd be lucky to see a noticeable performance increase. Guess they might sound nicer because there would be less resonance.

[jimbo1234567]

you can buy the flanges from milltek prob through someone like mrc but as scott said you will probably see no power increase maybe 5-10 hp at the very most. and certainly not worth the hassle of swapping them on the car but if you supply and or fit rs4 flanges they will be a lot more saleable and you will get your money back plus a bit more if you sell them on.