ICV question

[Cloggy Saint]

Can someone tell me the difference between the L and T shape icv's, and if they're interchangeable without other mods? Cheers.

[liam012]

i'm no expert but i know that one reason may be that there are different inlet rubber boots - some with a hole for brake servo some without, also some are rigged for T shaped icv and some for L shaped icv - i'm not sure why though - all 325i boots i have seen have been without brake servo hole and setup for L shaped icv - all 320i boots i have seen have had the brake servo hole and setup for T shape icv. maybe just coincidence though as surely some 325i ran a brake seerrvo of the inlet boot i would imagine.

[Cloggy Saint]

so what's the score when changing from a 2.0 TB with a T shape icv to a 2.5 TB? Are all 2.5 TB bellows set up to only accept the L shape??