Mast Motorsports

05/25/2026

🚨 FINAL DAY 🚨

This is your last chance to save 20% on select Factory Mast cylinder heads at Mast Motorsports.

If you’ve been planning a junkyard 5.3 build, upgrading your street setup, or replacing disappointing OE-style heads, now’s the time to step up to proven Mast performance.

Built for real airflow. Real power. Real enthusiasts.

⏰ Sale ends tonight
🔥 20% OFF Factory Mast 5.3L As Cast Cathedral Heads
💥 Horsepower for All

Don’t miss it — once the weekend’s over, so is the deal.

05/22/2026

🇺🇸 MEMORIAL DAY SALE 🇺🇸

20% OFF select Factory Mast cylinder heads this weekend only at Mast Motorsports

🔥 5.3L As Cast Cathedral Heads
🔥 Mast Minotaur 5.3L/LS3 Hybrid Heads
🔥 LS3 Medium Bore As Cast Heads

Built for real airflow, real power, and real enthusiasts. Whether it’s a junkyard 5.3 build or your next street setup, this is Horsepower for All.

⏰ Sale ends soon — shop now before it’s gone.

05/18/2026

Two wins. Two classes. One common denominator. 🏁

Congratulations to these racers for putting their Mast-powered combinations in the winner’s circle and proving what real horsepower can do when it counts. From the launch to the stripe, these engines were built to perform under pressure.

At Mast Motorsports, we don’t just build engines, we build winning combinations. Whether you’re chasing class wins, personal bests, or a championship, we’re ready to help power your program.

Ready to build your next race-winning engine? Contact Mast Motorsports today and let’s make horsepower happen. 💪🔥

05/06/2026

The team at Mast Motorsports is sending our condolences to the family and friends of Kyle Loftis, who was instrumental in the growth of the motorsports industry and treasured by the whole community. RIP Kyle, we will always remember you.

05/06/2026

We’ve got a problem… and it’s your gain.

Our shelves are PACKED with Factory Mast 5.3L Cathedral Cylinder Heads, and they need to go. If you’ve been planning a build, a junkyard refresh, or just want to wake up your LS the right way, this is your moment.

Stop settling for questionable OE replacements. These heads are built for real bolt-on horsepower. No guesswork, no compromises.

More airflow. More power. More reliability.
Same mission: Horsepower for All.

Inventory is overflowing, but it won’t last forever. Tap in and upgrade your setup today.

03/27/2026

Our mission has always been simple:
Horsepower for All.

That means your junkyard 5.3 deserves airflow that matches your ambition.

During our Spring Refresh Sale, save 20% on Factory Mast Cathedral Cylinder Heads — designed specifically for bolt-on builds that want more power without going full race.

Don’t waste your build on restrictive castings.
Upgrade the foundation. Feel the difference.

03/22/2026

Mast Headed Harrell Engine & Dyno built engine putting in work!

03/20/2026

You didn’t pull that junkyard LS to keep it stock.
So why bolt on heads that perform like they are?

This Spring Refresh Sale:
20% OFF Factory Mast Cathedral Heads
More airflow.
More efficiency.
More usable horsepower.

Because “good enough” isn’t in our vocabulary.

03/18/2026

03/13/2026

A cam swap won’t save restrictive heads.

If you're refreshing your junkyard 5.3L this spring, do it right.

Factory Mast As-Cast Cathedral Cylinder Heads — 20% OFF.
• Optimized port design
• Bolt-on performance
• Designed to outflow stock replacements
• Built to support real horsepower

This is what Horsepower for All looks like.
Upgrade smart. Upgrade once.

01/23/2026

Someone’s got to have one of our standard deck height Mozez gen 2 intakes they want to help Jackstand out with! We have been tooled up on other projects and don’t have any standard deck lowers available.