found some fotos of "new" exhaust system
as replacement for previous built from remains in the garage
headers: AR 2L TS EU 2 - you have to weld 2 M18x1,5 nuts for laba probe on the primaries and one behind the secondaries.
CAT : I´m using NO cat, so you have to add. Lambda sond adapter, or disable this in ECU
Pipe: 54mm Group N by Ragazzon for JTD
BAck box: Ulter sport for Stilo Abarth
CAMS: timed acc. to Alfa 2L TS locks, nothing else to do (You have to swap the Exhaust cams wheel, because of different pattern ofr phase sensor)... you can fint that the exhaust seem to be little restrictive for this mod, I feel that after 4500 the power delivery is similar to serial cams with std. exhaust, header (seem that headers with cat directly on engine are the main cause of problem)
2lt botom end: you have to swap crankshaft trigger wheel (cranshaft has to be removed from block to do this) and alls sensors... ad thats alll.. but its better to built it to the 1.8 rebored block, due to balance shafts, wich weight a lot...