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Has this system been used? If so, how old and how many km? Why the catless headers? If you had the header/200 cel cats, it would be an easy decision.
Yes system was used for less than 1 season (~2000kms) because the car was being sold. To maximize the performance and sound catless was the best option. Let me know if you have any other question or want to pursue your interest in this exhaust setup.