is this valve an aftermarket or original on my 2.8 Z3

[Stephen alan]

 

[D R Oldfield]

Hi thats standard fit on the 2.8 it open up the exhaust as the engine goes up the rev range and reduces noisy when driving around town at lower revs

 

[Stevo7682]

Only standard on late model 2.8 and face-lift 2.0 the earlier 2.8 weren't fitted with it .

Stephen.

 

[D R Oldfield]

my 1998 2.8 single vanos is fitted with one