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One way to compensate for the reduced volume in the short-side dual-plane plenum is to remove a portion of the divider wall, as on the TFS StreetHeat manifold. This tends to improve top-end power with losses to low-speed torque in some cases. The Dart SHP and the Jegs Champion also employ these cutouts and may be a good reason why these manifolds make good peak horsepower. ➔You’re not a true car crafter unless you have dimpled a hood with an air-cleaner stud that was too long. Shame on you if you’ve done it more than once!