NAS Performance

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.

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

09/23/2026

Are you as particular about your engine setup as we are and want your engine to look as amazing as it performs?

We now offer zinc plating on full longblock hardware as an option with our full longblock builds.

Here’s a before-and-after of a complete hardware kit for an EZ30R we’re currently building. The transformation is incredible — that bright zinc finish gives the hardware a clean, fresh appearance that really sets off the finished engine.

Because the little details matter. 🔩✨

Photos from NAS Performance's post 09/23/2026

EZ30R bolt in Baffle pre-sale is live! We have been selling them like hot cakes! Units will ship in about 2-3 weeks! We are very happy to offer this great oiling solution for an affordable price of $250!

EZ30R Oil Baffle Kit
Keep oil where it belongs when the G-forces start building.

The NAS Performance EZ30R Oil Baffle Kit is designed to improve oil control in the Subaru EZ30R during hard acceleration, braking, and sustained cornering. The multi-piece baffling system helps limit oil movement away from the pickup while allowing oil to return toward the pickup area.
Constructed from lightweight stainless steel, the kit features strategically positioned baffles and trap-door style flaps to help control oil movement within the sump under high-G conditions.

Features:
* Purpose-built for the Subaru EZ30R
* Stainless-steel construction
* Multi-piece baffling system for improved oil control
* Trap-door style oil control
* Helps reduce oil movement during high-G cornering, braking, and acceleration
* Designed to work with the factory oil pan
* Lightweight, low-profile design
* Precision-formed components for consistent fitment
* Includes a new OEM Subaru magnetic oil drain plug

Whether you’re building a dedicated race engine or simply want additional oil-control protection for an EZ30R that sees aggressive driving, the EZ30R Oil Baffle Kit provides an added layer of protection against oil starvation caused by oil movement in the sump.

09/23/2026

Our NA built engines only speak Chopanese 🔪🔪

09/22/2026

EZ30R bolt in oil baffle is now officially live❗️❗️Don’t miss out to get yours on the first batch! If you need shipping outside of the US, message or email us to arrange that!

09/21/2026

13.5:1 EZ36 Closed Deck Monster loading 😈 Is this the ultimate NA Subaru build?

Photos from NAS Performance's post 09/19/2026

First article of the EZ30R baffle! Very happy with how it fits. We will launch the pre sale soon! Finalizing some hardware details now!

09/19/2026

New parts are not clean parts! All parts get a nice steamy bath before final assembly! These are our custom EZ36 rods!

09/16/2026

We’ve been putting some work into the website and have several new engine options and configurations coming together! 🔥

We’ve updated our Shortblocks, Heads, and Longblocks sections with some exciting additions:

🔹 EJ251S (Street) — A new street-oriented option alongside our popular EJ251R (Race).

🔹 EJ253R (Race) AVLS Heads — Now offering our race-spec AVLS heads with billet cams for those looking to maximize the EJ253 platform.

🔹 EJ251R/S Longblocks — Our EJ251R and new EJ251S configurations are now available as complete longblock options.

We’ll also be working on adding our H6 Shortblocks, Heads, and Longblocks to the website soon. We have a lot of H6 configurations and options to get listed, so there will be quite a bit more coming in that area.

Also, a quick EZ30R update: Our motorsport-grade EZ30R baffle pre-order will be coming soon! We should have the first article in very soon so we can test-fit it, verify clearances, and confirm everything is ready for assembly before opening the pre-order.

More updates coming soon! 👀

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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