- E46 - 323i, 328i;
- E39 - 523i, 528i
- Z3 - 2.5i, 2.8i M52TU double vanos
This adapter is made to fit M52 TU (double vanos) throttle body on M54B25 intake manifold.
Intake manifold must be from 2.5ltr M54 engine (E46 325i or E39 525i)
Comes with fitting hardware. Adapter will not restrict air flow due to special design.
M54 manifold conversion for these engines will give 10-15 bhp more power and a very strong top end as it lets the engine breathe much better.