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I know they are far from optimal, but about how much power loss are we talking? This motor currently is all in by 5k... lol dang deisel.

Another header question, will the slip fit tubes be leaky if used with an actual exhaust? Seems like they very well could with the back pressure... ?



Hard to say how much power you would loose... on the
slip fit, they are pretty decent fit(or they should be)
and after a short time they tend to seal up even better
(rust and or carbon)