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I didn’t dyno the car so can’t say too much about performance but I can say the throttle response is much better. I went catless headers and have steeda H pipes installed and the car is DUMMMMMMY loud lol. Cold starts are brutal. Thank god for active exhaust. And definitely not passing emissions...

I installed Kooks 1 7/8 Catless headers on my active exhaust 24. All I did was order a pair of o2 sensor spacers for around $15 and no CEL.