Its nothing more than a $$$ grab?? a bit like the tr port covers that add .5 hp.
At the end of the day the right tune clutch pipe and a light car will take the flag???
At the end of the day the right tune clutch pipe and a light car will take the flag???
I thought so myself but I got my answer before I bought it. Non sig is cnc machined. Sig is cnc machined and hand touched up.
