Quote:
Originally Posted by X5Dawg
So what are you going to do about cats since the OE ones are built into the manifold??
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I have the option of mounting some universal high flow cats further down where the resonator used to be, and buying some O2 sensor extenders. But for now I am going to drive without them. We don't have to have our cars tested for emission here.  The cats are just HP robbers.
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2010 X5M /// R63 AMG...Wifey's 540HP Family Hualer
2001 X5 3.0i Sport 335,448 miles & counting...
SMG M3 Steering wheel
E46 Stainless Racing Headers
4.6is Exhaust
Turner Pulleys
Afe Intake
Brembo drilled rotors
PowerFlex Bushings
Hualingan
30mm H&R Spacers rear
20mm H&R Spacers front
Bavarian Autosport High-Performance Coils
Active Autowerke's Performance Software
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