2013-2014 Legacy 2.5 Crawford Performance Billet Power Blocks

2013-2014 Legacy 2.5 Crawford Performance Billet Power Blocks Crawford Performance Intake Manifold Spacers / Billet Power Blocks (BPB) for 2013 & 2014 Subaru Legacy 2.5i Adds 15 HP / 22 TQ - No Tune Required Improves Acceleration Decreases Delay between Shifts with AT Increases the Volumetric Efficiency of your Intake Manifold Maximizes the Potential of Aftermarket Intakes Installs in an Hour or Less Naturally Aspirated (N/A) vehicles are starving for air without a turbo. Sure, an aftermarket Intake / Cold-Air Intake will bring more air in, but without a bigger volume in your intake manifold to receive the extra air, the air flow essentially gets choked before it has a chance to enter the engine. The Crawford Billet Power Blocks raise your intake manifold, lengthening the intake runners. This increases the volumetric efficiency of your manifold, which provides optimum airflow so that your engine receives as much air as your intake (OEM or aftermarket) can throw at it