S52 Exhaust manifolds vs. S50

[m3f_beemertek]

I have a 95 m with a s52 long block, everything is obd1 including the s50 exhaust manifolds. I want to know if anyone knows the power gains from changing to s52 manifolds.

[m3f_SG_M3_d1201712b5]

s52's are stainless steel, lighter, and flow a bit better.

[m3f_Drifter_23d8df4bc6]

Sg M3 is right. And nice photo.