It will burn up your cat if you delete it with the factory ECU. Racing beat sells a block off plate though for $10. I would recommend an access port if you're going to use the factory ECU. Then you can just disable the air pump codes from the computer and re tune it for warm up to be a little less rich.
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My Cars:
1974 RX4 Coupe
1991 FC3S RX7 - Sold
2003 ZZW30 MR2 (Rotary swap after RX8)
2004 SE3P RX8 (20B Swap in the works)
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