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3002 tii · 03-17-2015, 09:26 AM

I think secondary cats were only off the 3.0si (n52). I know for a fact my original exhaust had them. The secondary cats however don't have any holes to plug sensors into.

03-17-2015, 09:26 AM	#4
3002 tii Lieutenant General 2285 Rep 12,565 Posts Drives: Z4 M, X5, GX460 Join Date: Apr 2008 Location: CT iTrader: (99) Garage List F15 X5 xDrive35i [8.75] E86 Z4 M [10.00] F10 550i (Retired) [9.17] F25 X3 xDrive35i (R ... [9.43] E82 135is (Retired) [9.50] E85 Z4 M (Retired) [9.41] E90 328i xDrive (Re ... [9.25] E86 Z4 3.0si (Retired) [9.24]	I think secondary cats were only off the 3.0si (n52). I know for a fact my original exhaust had them. The secondary cats however don't have any holes to plug sensors into. __________________ Follow for latest mods
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