I'm trying to find out if the Black intake tube between the MAF and intake elbow is exactly the same size in an S4 (86-88) and an S5 (89-92) for N/A engines. Does anyone have both to compare side by side and let me know???
I do not want to cut the one I have on my 86' if the other one is shorter. This is for an experiment and I might want to revert the process, which would be hard if I cut the tube.

Thanks

 

they are about the same length, same diameter. the S5 has an extra vacuum fitting, and i wouldn't be surprised if its a slightly different curve, but it should interchange with an S4

 

Just to be picky, there ain't no vacuum in that tube, it's all metered air.

 

lol, true. its a metered air feed for the idle control and the Accelerated warm up system

 

Is there anyone that has them both and can take pictures for comparison on the shape?

 

Someone???

 

Foxed.ca
look up the parts in the parts manuals and compare for yourself.