I think my Spearco core is rated at 1500 cfm and a .5psi drop at 15 psi. Supposed to be about the best on the market. Keep in mind though. For a street car that drives at low speeds in traffic, a longer core is optimal because it allows more time for the air to cool. A short wider cooler flows more air, but allows less time for the air to be cooled. This is not good when you have a very minimal airflow speed through the fins.
I am making between 900-1000 hp, so every 1% in hp increase really adds up!
