Abrasive flow machining allows Extrude Hone AFM to improve internal intake passages using a polymer media filled with abrasive particles.
As the media travels through the runner, it conforms to the passage and removes material at a controlled and consistent rate.
Extrude Hone AFM's existing Kansas City porting material specifically describes AFM as a more uniform alternative to hand porting.Why Intake Manifold Porting Matters

Internal restrictions can reduce the efficiency of that pathway.
Potential problems include:
- Rough casting texture
- Uneven runner surfaces
- Burrs
- Restricted transitions
- Variations among passages
Porting aims to reduce unnecessary restriction while retaining an appropriate shape and cross-sectional area for the engine.
How AFM Ports the Runner
Hydraulic pressure forces abrasive media through the manifold.
The media acts like a flexible slug that conforms to the passage.
Abrasive particles suspended throughout it contact all reachable surfaces along the flow path.
This allows AFM to work around turns and within enclosed runners where traditional hand tools may be limited.
AFM and Intake-Manifold Performance
Extrude Hone AFM reports that suitable intake manifolds can experience flow improvements of up to approximately 25 percent after AFM.Improved flow may support:
- Better cylinder filling
- Greater volumetric efficiency
- Increased horsepower
- Improved torque
- Better combustion efficiency
Actual engine-level results vary.
The manifold is only one part of the induction and combustion system.
Kansas City Automotive Applications
Kansas City has a significant automotive and transportation manufacturing presence, along with performance shops, muscle-car enthusiasts, diesel work, restoration, racing, and specialty engine machining.
AFM can be useful for both performance builds and production components.
It may also offer a way to improve older cast-iron or hard-to-replace manifolds where no suitable aftermarket replacement exists.
Aluminum and Cast-Iron Manifolds
Extrude Hone AFM's Kansas City automotive information notes that abrasive media can be varied according to workpiece material.A lighter approach may be used for aluminum, while cast iron may require heavier abrasion.
This makes the process adaptable to a wide range of modern and older engine components.
Repeatable Flow Matching
A developed AFM process can be repeated using defined tooling, media, abrasive, and pressure.
That repeatability may help builders or manufacturers seeking similar results across several components.
Because parts are processed under controlled conditions, AFM reduces reliance on variations in individual hand-porting technique.
Controlled Material Removal
For automotive flow improvement, Extrude Hone AFM notes that up to approximately .040 inch, or 1 millimeter, can be removed where appropriate.
The actual amount depends on the manifold.
Request Kansas City Intake Manifold Porting
Call (562) 531-2976 to discuss your Kansas City, MO intake manifold with Extrude Hone AFM.
FAQs
Can AFM port both aluminum and cast-iron manifolds?
Yes. The abrasive approach is adjusted according to the material.
Can AFM improve runner consistency?
Yes. Uniform and repeatable internal finishing is one of the primary advantages of the process.
Does Extrude Hone AFM serve Kansas City?
Yes. Extrude Hone AFM serves customers throughout the United States.



