Hi Guys,
Just to add on this and hopefully help a few people out.
As the engine is positioned longitudanally in the A4/PASSAT than the transverse in the K04 S3/TT/Leon, the turbo manifold and turbo is a totally different fit. The transverse cars have a different turbo position and therefore manifold offset depending on whether they are R/H/D or L/H/D too, due to the brake servo and steering rack getting in the way.
The A4 don't have this problem whether its R/H/D or L/H/D as the turbo is side on and away from the bulkhead.
We have an easier time with our cars.
To get K04 power in our cars turns out to be very quite simple. We need the K04-015 turbo.
Yes that -015 makes all the difference.
This turbo is a true K04, yet bolts onto our manifold with no modifications. The -015 denotes the different fitment.
I belive it is the same case with the exhaust downpipe, it fits with no need to change.
With uprated injectors and a fuel pressure regulator like the ones found on the S3/TT and a remap. You will be looking a decent gains for the outlay with potentially 235-275bhp depending on what intercooler sytem you have (single or twin or FMC)
Do a little research and you will find information in regards to this conversion. I hope to do mine soon.
Hopefully this will help
