Hi everyone,
I drive '07 Z4 M Coupe. I ordered SS Stepped Headers "044001". This headers called SS V1 Stepped in US. But after a long research, I heard that, I can not use this headers with my stock cats. Is someone have an info about this? This headers flange is 63,5mm but the stock cats diameter is 60mm. I am very confused because of this situation.
Mert
I drive '07 Z4 M Coupe. I ordered SS Stepped Headers "044001". This headers called SS V1 Stepped in US. But after a long research, I heard that, I can not use this headers with my stock cats. Is someone have an info about this? This headers flange is 63,5mm but the stock cats diameter is 60mm. I am very confused because of this situation.
Mert
