[will_e92]

There is an n54 top mount kit for sale near me and I was wondering if other than fabbing the manifold to fit the mounting points are there any differences I would need to work around? I want to fit it on my e92 n55

[wheela]

Off the top of my head, the n54 coolant pipe enters the block in the middle vs. at cylinder 5 like n55, not sure if the stock n55 coolant pipe would clear the top mount kit plumbing? For O2 sensors, an n54 manifold probably has two ports pre-turbo on the manifold, you'd want to plug those for n55 since both your O2's would go in the downpipe. And you'd need to tune to run mafless. Not an all-inclusive list here, just some thoughts off the top of my head.

[wheela]

You could also eyeball Speedtech's site and look for what's different between there n54 and n55 top mount kits. I think there n55 top mount is for f-chassis, so you'll need to consider those differences as well.