My question is does the turbo2 front cover fit on a 6port motor? Is there any modification or fab required? Are there any compatibility issues between s4/s5 covers? Looking to take advantage of the turbo oil feed.
Apologies my search skills are subpar.

 

If you want to take advantage of the oil feed, then no, bolt it on.

 

There are differenced between the S4 and S5 covers. The S5 has a different metering oil pump flange and I believe, though best to confirm this, that there are interference issues with the S4 water pump housing.

 

There are a whole host of compatibility issues between the S4 and S5 covers ranging from the metering oil pump, water pump, and front counterweight interference. Within a series, the Turbo II and naturally aspirated covers are interchangeable. The only difference is the oil feed.

 

Awsome, thx for the info.