Ernie, am currently flying the stock pipe but am open to suggestions. If you can give me hard facts to back up the performance claim I would step up and do the Mousse can. I can tell you for a fact that, on my engine, a Magnum 1.08 carb did not do what many have claimed it would so am thinking about the pipe anyway. Would like to know RPM gain and exact pipe lengths and measurement points. As a side non-benefit... the Magnum carb is alot harder to get corrrect mixture with and a single click will put you there and another will put the engine wayyy lean. May go back to the ST carb.