What's one of the most overlooked anti-flowing Subaru pieces you ask? The stock exhaust manifold crossover. 50% of your exhaust gases are passing through this tiny pipe and which isn't good. Well here comes the solution for this problem.
Welcome the GrimmSpeed Version 2 Subaru Exhaust Manifold HiFlow Crossover. They've decided to step it up a notch with the first revision of the crossover. Meet HiFlow Crossover v2. Immaculate welds, smooth as butter 2" stainless s. . . Show More >
What's one of the most overlooked anti-flowing Subaru pieces you ask? The stock exhaust manifold crossover. 50% of your exhaust gases are passing through this tiny pipe and which isn't good. Well here comes the solution for this problem.
Welcome the GrimmSpeed Version 2 Subaru Exhaust Manifold HiFlow Crossover. They've decided to step it up a notch with the first revision of the crossover. Meet HiFlow Crossover v2. Immaculate welds, smooth as butter 2" stainless steel, thick 12mm stainless flanges. You can't beat this piece.
Customers have seen up to 15 HP INCREASE when combined with a PnP Subaru Exhaust Manifold. This unit is built from 1.92" 304 Stainless Steel throughout, maximizing exhaust flow from cylinders 1 and 4 to the manifold collector for faster turbo response. This unit has a flex in the center to allow for easier installation and for thermal expansion during hard driving.
Add on GrimmSpeed's amazing Black Ceramic Heat Coating help keep the heat in and speed up those exhaust gasses even more.
New hardware, as well as new gaskets, will be included to make the HiFlow Crosspipe ready for the installation. < Show Less