Which ones flow the best on a 10? The only ones I have some "sprerience" with on a modular engine is JBA and it was a good sperience. To go with, you would need the related X pipe or H pipe. Which one is better? I'm thinking Kooks, X pipe and finishing it off with catback maga pack. Header gasket recomendations also! What say ya'll fellow 10 doods or ladies? I wish I still had all the stock exhaust manifolds I ever took off (if only my pops had'nt of thrown them out)!