So after my recent c7 purchase I have spent literally a week watching exhaust videos and reading forum . If anyone can answer the following questions I would be grateful -
1) I am now reading that replacing my oem x pipe and secondary cats with an aftermarket replacement x pipe can cause a loss in power if the car isn’t re tuned ?
2) I have watched numerous videos on axle back after market exhausts …. Some just delete the whole npp valve system which is fine .. but what confused me is that some aftermarket exhausts delete the AFM (air fuel mixture sensors) that are situated before the muffler .. surely this upsets the running of the car ?
any recommendation re aftermarket exhausts without having to retune the car ? Thanks
1) I am now reading that replacing my oem x pipe and secondary cats with an aftermarket replacement x pipe can cause a loss in power if the car isn’t re tuned ?
2) I have watched numerous videos on axle back after market exhausts …. Some just delete the whole npp valve system which is fine .. but what confused me is that some aftermarket exhausts delete the AFM (air fuel mixture sensors) that are situated before the muffler .. surely this upsets the running of the car ?
any recommendation re aftermarket exhausts without having to retune the car ? Thanks