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9 LSU sensors in our wideband controllers
2003-13 Forester XT
but it is common place for the factory plastic piping to split especially when the vehicle has been tuned (due to more boost)
The problem with most performance type exhaust systems is they compromise both flow and sound quality to try and achieve a balance between the two
Integrated Engineering ProCore Downpipe Kit Fuel Plumbing Kits 9 LSU sensors in ourThe IE ProCore Downpipe for your Audi B9 S4 or S5 delivers an improved exhaust note and increased flow. Our in house engineered 6" 400CPSI catalytic converter channels substantial flow to support upgraded engine tunes and larger turbochargers. The specialty tri core design and precious metal coatings align with ECU emissions requirements so that you can upgrade without the check engine light. IE's in house engineered ProCore Catalyst features our own