Hey, im looking into getting new headers for my corolla but just wondering if anyone on here knows if its worth it. i was looking at the weapon r but apparently they are equivalent to oem and you get no extra gains, airflow or sound from it. that being said dc sports makes headers and im just wondering if anyone knows the stock sizing of corolla headers so i can see if i can get some more sound out of it. have a borla type s exhaust and cai but id like a little more if i could. i messaged someone about the dc headers and they said “'Unfortunately, I don’t have this information available. I looked around as best as I could on the web, but I didn’t find the stock runner size. The primary runners’ inner diameter on our header is 1.4 inches wide, and the collector size is 2.5 inches.
