Fast Stacks, Medium Set Of 8 - Lsx 103Mm Tunnel Ram Style Intake Manifold

The LSXHR 103mm Intake Manifold's interchangeable velocity stacks allow for the fine tuning of the LSXHR's powerband. Available in tall, medium and short, these stacks can be mixed and matched to improve performance and also to fine tune an engine on a cylinder by cylinder basis. The LSXHR tall velocity stack set shifts torque and horsepower to the middle RPM operating range. This stack set fits both the LS3 and LS7 LSXHR manifolds. See 146073-1 for an individual stack.