Quote:
Originally Posted by diego@vossen
My advice is keep stock headers and cats. I had HFC's and one cat blew after a few hundred miles. When I went back to stock cats per Stillen, I made more power also. A few other's I know personally also lost power when going from stock cats to ART pipes and went back again to stock cats to get the numbers back.
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Diego, did you experience the power loss on HFCs with the Stillen base tune or did u run a custom tune and still lost power over stock cats?