Does b5 s4 back box fits a4 2.5 tdi quattro ?

adamss24

Registered User
hi guys, as per title, anyone know the answer to that question ? many thanks !
 

aragorn

"Stick a V8 in it!"
Staff member
Moderator
VCDS Map User
Well it should bolt to the car, however you may need a reducer on the end of the S4 backbox as it might have a larger bore than the TDi.
 

adamss24

Registered User
You shure about it ? I think the rear box is about 3'' on the tdi after the cats...but i would double check that in the morninh though ! Thanks for the reply.
 

aragorn

"Stick a V8 in it!"
Staff member
Moderator
VCDS Map User
The vagcat diagram isnt very clear, but i think it suggests the S4 has a 65mm pipe, and the diesel has a 60mm pipe.

Not insurmountable though!
 
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