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Discussion Starter #1
hello all,

i recently had a problem with my engine so had to replace it; got the 545i engine instead and it fitted perfectly.

i am aware that the N62 engine on the E53 produces 320bhp and that of the 545 is bumped up t0 333bhp however i havent noticed any difference in the performance.

any ideas why
 

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It is only a small increase in power, approx 5%, and even then, the full 5-ish% might only be at the BHP peak which would be somewhere near 5000-5500rpms.

The good thing is you haven't noticed any loss in power, so it looks like a job well done.
 
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