NAS Performance

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NAS Performance At NAS Performance, we specialize in high-performance naturally aspirated Subaru engines for NA4WD stage rally and track cars.

From purpose-built rally motors to custom Subaru builds, we deliver precision, reliability, and winning performance.

Temps are dropping, so we got a fresh battery setup in one of the shop cars from MeLe Design Firm! 🥶🔋We went with the Me...
10/17/2026

Temps are dropping, so we got a fresh battery setup in one of the shop cars from MeLe Design Firm! 🥶🔋
We went with the MeLe 900 Series paired with a Full Throttle FT410 for a compact, lightweight setup tucked behind the passenger seat of our WRX wagon. Under the hood is a fully built stroker EJ207! 💪
Ready for the colder months! 🤙

No days off. Lock in. No luck, all discipline. We got some race engines to build 💪
10/13/2026

No days off. Lock in. No luck, all discipline. We got some race engines to build 💪

Huge power EG33 heads hand ported, and chambers worked. They are ready for our all custom valvetrain! Stay tuned for upd...
10/11/2026

Huge power EG33 heads hand ported, and chambers worked. They are ready for our all custom valvetrain! Stay tuned for updates!

If you are at Subiefest, go check out one of our customers circle track racecar! Trenten is great dude! This has our EJ2...
10/10/2026

If you are at Subiefest, go check out one of our customers circle track racecar! Trenten is great dude! This has our EJ251R+ engine! (More aggressive cams than normal EJ251R)

Custom EJ25 DOHC stroker rotating assembly. 🔥12.0:1 compression super-light flat-top pistons, A-beam super-light steel r...
10/08/2026

Custom EJ25 DOHC stroker rotating assembly. 🔥

12.0:1 compression super-light flat-top pistons, A-beam super-light steel rods, and a billet WPC/cryo-treated crankshaft with fully knife-edged counterweights.

Built for serious RPM—ready for 13mm cam lift and 9,000 RPM. 🤙

We’re always pushing the limits of what these Subaru engines can do. Innovation never stops.

NAS crate longblocks! 🌎We can ship virtually any NAS Performance Subaru engine worldwide, making it possible to get your...
10/04/2026

NAS crate longblocks! 🌎

We can ship virtually any NAS Performance Subaru engine worldwide, making it possible to get your dream NAS engine no matter where you are.

From EJ to FA/FB to H6, we build and ship complete crate longblocks ready to power your project.

Whether it’s a street car, rally car, track build, or all-out race car, your NAS engine can be delivered right to your door—anywhere in the world.

EZ30 turbo 10.0:1 pistons back from being coated with Line2Line Coatings abradable skirt coating and Calico Coatings HPT...
10/03/2026

EZ30 turbo 10.0:1 pistons back from being coated with Line2Line Coatings abradable skirt coating and Calico Coatings HPT crown thermal coating. Ready for all the boost 1000+hp!

We have been using these seal installers from Shawn Hutchins for a bit, a recent project they helped a lot on was instal...
10/03/2026

We have been using these seal installers from Shawn Hutchins for a bit, a recent project they helped a lot on was installing a new axle seal on our shop car. We replaced an axle boot and have had a bit of a leak on the seal on transmission since. Yes we gave it a good brake clean bath after installing the axle. Check out their 3D printed seal installers and walnut blasting fixtures!

Lots of people have asked over the years! We are stoked to now offer it! EJ253R AVLS! Billet far more aggressive cams fo...
09/29/2026

Lots of people have asked over the years! We are stoked to now offer it! EJ253R AVLS! Billet far more aggressive cams for AVLS heads! Heads are fully ported, ton of chamber work, full machined, stainless valves, beehive spring kit and bronze guides with stoppers! Hit us up to order yours now! We have this set pictured available! These heads need to be paired with our shortblock as well. The huge power increase will break stock rods.

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

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