Katech Engineering offers precision CNC porting for GM Gen 5 LT4 cylinder heads, using Katech-developed port programs designed to improve airflow consistency and overall performance potential. Each intake and exhaust port is CNC-machined to deliver repeatable, balanced results across all cylinders while maintaining proper port geometry and compatibility with OEM-based architecture.
This CNC porting service is ideal for high-performance street, track, and competition LT4 engine builds where improved airflow efficiency, durability, and support for increased power levels are required. CNC porting provides a strong foundation for camshaft upgrades, increased boost, and complete performance engine builds without compromising reliability.
To have your LT4 cylinder heads CNC ported by Katech Engineering, please follow these steps:
Remove the cylinder heads from the vehicle
Disassemble the cylinder heads to a completely bare condition (valve seals MUST be removed)
Thoroughly wash and clean the cylinder heads (heads that arrive with any oil residue or carbon in ports will be charged a minimum $70 cleaning fee)
Print a copy of your order confirmation, place it in the box, and ship the heads to:
Katech Engineering
Attn: Cylinder Head Department
24324 Sorrentino Ct.
Clinton Twp., MI 48035
IMPORTANT: Failure to include a copy of your order confirmation inside the package will delay or prevent processing.
Proper packaging is critical to prevent damage during shipping:
Use generous bubble wrap, especially on all corners
A double-box method (wrapped heads boxed inside a second box) is strongly recommended
Do not use packing peanuts, as they do not provide adequate protection
If you would like Katech Engineering to disassemble, wash, and re-assemble your cylinder heads, please add those services using the related product links on this page.
Precision CNC porting of intake and exhaust ports
Katech logo engraving for identification and quality assurance
This product includes CNC porting service only. Assembly, valve work, and additional machining services are not included unless added separately.
* The “Expected to Ship” time shown is an estimate based on receiving your cylinder heads within five (5) days of order placement. Actual turnaround time may vary based on shop workload.
