FEULING OIL PUMP CORP. BA Air Cleaner Kit - Black with Black Filter - '93-'99 Evolution Big Twin 5563

If you're running a modified Evolution Big Twin, intake flow is where gains happen. The FEULING BA Air Cleaner Kit delivers measurable horsepower and torque by optimizing air velocity through a high-flow billet aluminum velocity stack, designed and validated on the flow bench, dyno, and track. This is a bolt-on upgrade that works immediately out of the box—no fabrication required.

The kit lengthens your intake runners and increases air velocity for balanced dynamic flow, with particular gains on engines running ported heads, modified intakes, and larger throttle bodies. The reusable air filter eliminates disposable filter waste, and the convertible backing plate lets you choose between OEM-compliant cylinder head breathing or optional direct venting to the intake. Every component is precision-engineered and manufactured in the USA.

• Billet aluminum velocity stack
• High-flow reusable filter
• Lengthened intake runners
• Optimized opening diameter
• Internal (ID) taper design
• Convertible backing plate
• OEM cylinder head venting compatible
• Fits '93-'99 Evolution Big Twin
• Bolt-on installation
• Flow bench developed
• Dyno and track tested
• Made in USA