NAS Performance
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At NAS Performance, we specialize in high-performance naturally aspirated Subaru engines for NA4WD stage rally and track cars.
06/16/2026
EZ36 porting finalized. A lot of hours went into these heads. We also smoothed and polished the combustion chambers to help make the 13.5:1 pistons a little more forgiving and reduce hot spots. The exhaust dogleg is particularly challenging on these castings, but we’re very happy with the final result. 🔥
Every port is hand-finished and tailored for maximum airflow while maintaining velocity and consistency cylinder-to-cylinder.
06/05/2026
Hand-ported EZ30 heads. Chamber smoothing, airflow improvements, and countless hours in the details. Some monster EZ builds loading... 👀🔥🚀
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Website
Address
Republic, MO
65738
Opening Hours
| Monday | 9am - 5pm |
| Tuesday | 9am - 5pm |
| Wednesday | 9am - 5pm |
| Thursday | 9am - 5pm |
| Friday | 9am - 5pm |
| Saturday | 9am - 5pm |
| Sunday | 9am - 5pm |