Dyno #s for Headers
JK
Anyway there are a lot of variations when people talk about header dynos.
Some people keep their cats, some don't, some tune, some don't, some dyno is 110 degree weather, some dyno in 55 degree weather. Anyhow who cares about #'s
But to answer your question, I believe QTP/Kooks/Thunder Racing headers provide the best performance


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