We specialize in custom cylinder head modifications and valve train development. Cylinder head porting is performed in house either by hand or CNC machine. The application will determine this choice. Our expertise allows us to improve airflow, increase horsepower, and improve overall engine efficiency, tailored to meet the demands of competitive racing.
At DEF Racing, we provide a comprehensive range of cylinder head services specifically tailored for 4-stroke engines. Below is a clear and concise overview of our offerings along with associated pricing.













SERVICES OVERVIEW
Cylinder Head Service Starting Price: $200
Cylinder Head Porting Starting Price: $350
Cylinder Head Milling Starting Price: $50
Recutting Valve Seats (Labor Only)
Starting Price: $50 per hole
Installing and Recutting Valve Seats (Labor Only)
Starting Price: $125 per hole
Moldstar Valve Seats
Starting Price: $30 per piece
Welding on Intake Spigot (Labor Only)
Price: $110
Intake Spigots
Price: $70
Our complete engine lease programs provide riders and teams with high-performance engines without the long-term commitment to creating an in-house engine program for yourself. This service allows access to championship-caliber engines for races, ensuring you have the reliability and speed you need on the track. Turn key race engines at your disposal.
With years of industry experience, we offer expert consulting services for engine design and performance optimization. Whether you’re a privateer or a professional team, our insights can help you achieve your performance goals through targeted strategies and solutions.
From concept to execution, our engineering and design support services cater to custom projects. Whether you’re developing a new engine or modifying an existing one, we work closely with you to bring your vision to life with innovative design solutions.
Vapor honing is also commonly known as wet blasting, liquid honing, vapor blasting, dustless blasting, or slurry mix blasting.
The multi-size grit/abrasive media (usually glass bead) is mixed with water and compressed air to blend before being propelled through a blast nozzle. This process is known as slurry blasting or vapor honing.
u200bContact us today to get your parts vapor honed!



