BC Brian Crower Valve Guides for Mitsubishi Evo X (BC3914/BC3915) Muteki is made from aircraft grade

is made from aircraft grade cast Aluminum and is engineered as a direct bolt-on upgrade for the stock frame Borg Warner® turbochargers that produces gains of +18 HP / +8 LB-FT TQ and increases airflow by 12% through eliminating airflow restrictions and significantly improving overall turbo efficiency

They also help keep the manifold aligned while bolting it into place

• Engineered and proven to support 700+ WHP

The filter is specifically placed to allow the use of the factory ram air duct

BC Brian Crower Valve Guides for Mitsubishi Evo X (BC3914/BC3915) Muteki is made from aircraft gradeValve guides are crucial components that wear over time, especially with high revving engines. To maintain proper tolerances and ensure optimal performance, it's recommended to replace worn guides with new aftermarket ones. BC premium valve guides for the 4B11 engine are crafted from Manganese Silicon Aluminum Bronze alloy, CNC machined to precise tolerances. They offer resistance to cracking and corrosion, reduce friction, and ensure ample