I need further info on what our corolla has is it just one catalytic converter or 2? From my understanding the one not connected to the headers won't cause a CEL if we have 2 like the scion tc. I came across this company Magnum Performance parts that has a model for the 10th gen corolla I emailed them letting them know I had a borla axleback exhaust and to see is this install as simple as just welding it on. With my exhaust being only from the axleback has the back pressure really been affected to a high degree? I need more help on figuring this out before I make a purchase. I'm really after the sound increase of my borla from my understanding high flow cats amplify the current sound your car already makes to a certain degree. This is the response I received
Dear Customer,
Thank you for considering Magnum Tuning as a potential source of your online purchase.
Although high flow cats are not designed to impact the exhaust note, as a side effect – that is supposed to be a pro for you – these cats amplify the sound. How much, I can’t predict though.
Bear in mind if you modify the backpressure significantly, this might cause the check engine light trigger. If so, you need to wire up an oxygen sensor simulator.
All Magnum oxygen sensor simulators,
http://www.magnumtuning.com/en/subc...s_water4gas/car-truck_performance_chips-oxygen_o2_sensor_simulators/#simulators
are designed to treat catalyst efficiency- and oxygen sensor related trouble codes triggered by exhaust modifications. If you can or want to use the heater of the factory oxygen sensor(s), you may wire up #795 (Easy CEL Fix). Heated #661 allows you to remove or eliminate the stock oxygen sensor completely.
Because your exhaust is not factory, we cannot warrant that check engine light will not be tripped after installation. The high flow cat in conjunction with the Borla system may conflict regarding air fuel ratio.
Although gas restriction, body dimensions and connection inlet / outlet diameters are vehicle specific on each Magnum converter, the installation is universal requiring MIG/TIG/Flux welding as described on the site.
Dual exhaust with two catalytic converters requires 2 units.
I trust our service will meet your expectations. Feel free to contact me with further questions.
Dear Customer,
Thank you for considering Magnum Tuning as a potential source of your online purchase.
Although high flow cats are not designed to impact the exhaust note, as a side effect – that is supposed to be a pro for you – these cats amplify the sound. How much, I can’t predict though.
Bear in mind if you modify the backpressure significantly, this might cause the check engine light trigger. If so, you need to wire up an oxygen sensor simulator.
All Magnum oxygen sensor simulators,
http://www.magnumtuning.com/en/subc...s_water4gas/car-truck_performance_chips-oxygen_o2_sensor_simulators/#simulators
are designed to treat catalyst efficiency- and oxygen sensor related trouble codes triggered by exhaust modifications. If you can or want to use the heater of the factory oxygen sensor(s), you may wire up #795 (Easy CEL Fix). Heated #661 allows you to remove or eliminate the stock oxygen sensor completely.
Because your exhaust is not factory, we cannot warrant that check engine light will not be tripped after installation. The high flow cat in conjunction with the Borla system may conflict regarding air fuel ratio.
Although gas restriction, body dimensions and connection inlet / outlet diameters are vehicle specific on each Magnum converter, the installation is universal requiring MIG/TIG/Flux welding as described on the site.
Dual exhaust with two catalytic converters requires 2 units.
I trust our service will meet your expectations. Feel free to contact me with further questions.
