View Full Version : B5 a4 4.2 swap questions

That black s4
02-13-2019, 06:36 PM
Hey guys I just snatched up a 4.2 v8 from a 2000 a8 for a really good price, what exactly do I need to swap it in to my 97 a4? The a4 was originally a 2.8 v6 5speed, i picked it with a blown motor and 1.8t ko4 swapped it. If that info helps at all, any help would be appreciated

Cactus Avant
02-13-2019, 06:40 PM
This will give you a good start, but there are lots of threads on it.


02-16-2019, 07:07 AM
I have a harness and ecu from a 2001 a6 4.2 and a bunch of spares if you need anything. Iím doing the same with an aby engine from an s8.