Any suggestions on the best(for the money) replacement Cat for a 1990 535i? I've been quoted names such as Miller, Alloem, D.E.C. etc. I would like OEM but don't want to pay dealer prices. Bekkers Imports claims the D.E.C. is a highflow cat. BMA sales the same at twice the price. All help appreciated.
Thanks,
Will Ollison
1990 535i
1981 528i
1975 2002