[B1257]

Hello Guys...Does someone know the exact difference between the engine of a bmw 335i n54 and bmw 335i biturbo alpina? Ik know different pistons, headgasket... But is the shortblock an cranckshaft also different?
Greets Patrick

Difference are only the pistons (lower compression than the stock engine) The headgasket is a metal version.
   
Take a look at the beginning of the ALPINA ETK you have to see it as an additional version to the BMW ETK.
 
Only ALPINA parts and not clear percetible BMW parts which are different to the basic car are listed.
For BMW parts the BMW parts catalogue has to be used.

The abbreviations used in several columns on the text lines have the following meanings:
1. item column (POS): picture number equal to the shown part, o.A. = not pictured
2. expression column
3. part number column
4. model column: wanted quantity; x = quantity is required
5. RHD-column: RHD-vehicle R = only for RHD-vehicle L = only for LHD vehicle
6. AWD - column: A = only for all wheel vehicle, R = only for rear wheel drive vehicle
7. remarks column (REM): a, b, c, ... country specification, use from/ up to, other Information. 

A: part number exchangeable with the one mentioned in the next line
E: part Number Is cancelled
W: part number is used alternatively by the one standing either befor it or afterwards (also marked with „W")
The nomenclature of the catalouge group overview is the same as the BMW ETK.

Base engine of the B3 and B3s is the N54B30A (O0) from the BMW 335i (E9x)/335xi (E9x)/335i

Now you can start working with the parts catalogue.