OBD1 intake part numbers??

[E30 Memorial]

What are the differences between different part number OBD1 intake manifolds, and advantages/disadvantages on an e30 M50/52-S50/52 swaps?

Part 11611735727 (INTAKE MANIFOLD) was found on the following vehicles:
E34 525i Sedan, M50, AUTO (HD63)
E34 525i Sedan, M50, MANUAL (HD53)
E34 525i Touring, M50, AUTO (HJ63)
E36 325i Convertible, M50, AUTO (BJ63)
E36 325i Convertible, M50, MANUAL (BJ53)
E36 325i Sedan, M50, AUTO (CB43)
E36 325i Sedan, M50, MANUAL (CB33)
E36 325is Coupe, M50, AUTO (BF43)
E36 325is Coupe, M50, MANUAL (BF33)
E36 M3 Coupe, S50, AUTO (BF03)
E36 M3 Coupe, S50, MANUAL (BF93)

Part 11611738354 (INTAKE MANIFOLD) was found on the following vehicles:
E34 525i Sedan, M50, AUTO (HD63)
E34 525i Sedan, M50, MANUAL (HD53)

Part 11611738940 (INTAKE MANIFOLD) was found on the following vehicles:
E34 525i Sedan, M50, AUTO (HD63)
E34 525i Sedan, M50, MANUAL (HD53)
E36 320i Sedan, M50, AUTO (CB23)
E36 320i Sedan, M50, MANUAL (CB13)

From Realoem

[Adrian_Visser]

AFAIK all OBDI m50 intake manifolds are the same.

[Voluted]

According to realoem:
11611735727 is the typical manifold found on e36 and e32 325i's and 525i's.

11611738354 was on early euro model 1990 525i's only.

11611738940 is the manifold from a european 320i which I am told has smaller dia. ports. It's also found on the euro 525i and 520i from 90-92.


Maybe some one else here knows for sure if the 320i/520i manifolds were smaller or not. To be safe i would just go with one from a 325i/525i.

[E30 Memorial]

All the head to manifold ports are the same sized larger obd1 runners. I'm just curious if there is any advantage of one over another.