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Custom Factory Head Porting, Cathedral or Rectangle Port, Customer Supplied Castings

Custom CNC Porting for your Cylinder Heads
Includes Valve job
Optimizes Intake & Exhaust Airflow
Consistent Port to Port Shaping
Evens Port to Port Airflow
Hand Refined to Further Maximize Airflow Results
Please Call for Availability


CNC Custom Head Porting with Benchflow Testing

This service is to optimize air flow in the cylinder heads.

Increasing air flow to an engine is one of the best ways to increase hp and torque. Head porting rids the intake and exhaust port chambers of irregularities, machine or casting flaws and obstructions. This dramatically improves airflow at low, mid and high valve lifts. When the surface is refinished, an even amount of airflow can enter and exit the heads. This results in an increased amount of airflow in the head that is even and consistent producing more hp and torque.

Butler LS uses a CNC machine that insures that all porting is precise and consistent from port to port. This is usually not consistent by hand porting.

After CNC porting is complete, we refine the porting based on the test results until optimum airflow is achieved.

Shipping Options-

No Shipping needed: the customer will use their own carrier to ship heads to Butler LS. We will provide address for shipment. Please note order number and last name on the outside of the package.

Prepaid shipping option: within 48 hours of the order Butler LS will email you a prepaid shipping label for your heads. Customer will need to have a daily pickup, schedule a pickup, or drop off at local UPS terminal.

Prepaid shipping option w/Boxes: within 48 hours of the order Butler LS will ship you boxes to package your cylinder head with prepaid shipping labels. Customer will need to have a daily pickup, schedule a pickup, or drop off at local UPS terminal.

Packaging heads for shipping: clean any excess oil/dirt/coolant if possible before boxing. Use a sturdy box to ship in. We advise wrapping the heads and padding the inside of the box to reduce possibility of damage.

Once heads are received, we will notify you and prep them for the porting process. Once the services are complete, we will clean and package the heads for shipping. There is no fee for return shipping.

Butler LS will not be responsible for damage or shipping discrepancies when customer supplied shipping option is chosen.


  • porting-cust-heads
  • porting-cust-heads
  • Butler LS
  • New


Shipping Information

  • Item Requires Shipping
  • 60.0 lbs.

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