Well for a start the 520 is a 2000cc engine and the 525 has a 2500cc engine so
there might just be a size difference and both might be slightly smaller than
your 328 with a 2800cc engine.
What exactly are you trying to UPDATE by fitting a inlet manifold from a smaller
engine or rather what do you hope to achieve by doing this?
Sir Hugh of Bognor
The difference between men and boys is the price of their toys.
The M52 intake manifold flows about two thirds the air mass of the
earlier M50. Fitting an M50 manifold to an M52 with a big bore throttle
body and remap can boost power from 193bhp to 230-240!
the 520i and 525i manifolds LOOK the same, but have different part
numbers. Hence my question.
Who needs a life when you've got Unix? :-)
Email: email@example.com, John G.Burns B.Eng, Bonny Scotland
Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here.
All logos and trade names are the property of their respective owners.