BoostLine Performance

Take a closer look at Boostline Performance’s CNC Ported
LS3 Heads. Starting with proven GM 821/823 castings, these heads are professionally CNC ported to deliver improved airflow, increased power potential, and the performance serious LS enthusiasts demand. In this video, we go over the features, machining quality, and what makes these heads a great option for everything from street builds to high-performance boosted combinations. If you’re looking to get more out of your LS engine, these heads deserve a spot on your radar. For pricing, availability, and additional information, contact Boostline Performance today.
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https://youtu.be/oYumGMtyWbA?si=Gm7hTy97DbYZbKbU
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Built through a collaboration between Boostline Performance, BTR, and Journey HQ for Project Hang On, this Turn-Key 427 LS Package is ready to be the heart of your next project. Starting with our proven Darton-sleeved aluminum block, this combination packs 427 cubic inches, forged internals, a BTR Stage 4 cam, ported 821/823 heads, Holley Terminator X Max management, and all the components needed to deliver serious performance.
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Whether you’re building a street car, truck, or weekend warrior, this package takes the guesswork out of the equation. Every combination is assembled, dyno tested, broken in, and ready to drop in so you can spend less time sourcing parts and more time enjoying your build.
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https://www.boostlineperformance.com/products/street-strip-series-427-sleeved-short-block
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Big power starts with airflow, and Boostline Performance CNC Ported 821/823 heads are designed to deliver. Built from genuine GM rectangle port castings, these heads receive a precision CNC port program and are assembled with quality components to support everything from aggressive street builds to serious race applications. Every set is pressure tested, machined, surfaced for MLS gaskets, and carefully assembled before leaving our shop.
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284cc intake ports
99cc exhaust ports
72cc chambers
2.165/1.60 stainless valves660 dual springs with titanium retainers
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If your goal is more horsepower without sacrificing reliability, these CNC ported 821/823 heads are a proven upgrade capable of supporting serious performance while retaining the durability of OEM GM castings.
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Introducing Boostline Performance LS Swap Packages!
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Take the guesswork out of your next project with a complete, ready-to-run LS package built to make your swap easier than ever. Every package is professionally assembled, dyno tested, broken in, and thoroughly inspected before it leaves our shop. Plus, each package comes equipped with Holley EFI and a base tune loaded, so it’s ready to fire up and get your project moving. Whether you’re swapping an LS into a classic muscle car, truck, hot rod, or race car, we’ve done the hard work so you can spend more time driving and less time chasing parts and tuning issues.
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Check out the available packages here:
https://www.boostlineperformance.com/collections/turn-key-engine-packages
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Questions? Give us a call and let’s get your project powered by Boostline.
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If you don’t want to wait, we’ve got you covered!
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Our ready-to-ship engines are already assembled, checked, and sitting on the shelf, no lead times, no guessing, no delays. Just proven combinations built the right way and ready to land at your door. From street series to street/strip short blocks, these packages are built with the same precision and attention to detail as every Boostline engine, just without the wait. Whether you’re putting together a budget street car or stepping up to a stronger street/strip combo, there’s something ready to go right now.
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✔️ Fully machined and assembled
✔️ Proven combinations
✔️ Built with quality components
✔️ Ready to ship immediately
No downtime. No excuses. Just bolt it in and go.
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Check out what’s in stock now:
https://www.boostlineperformance.com/collections/ready-to-ship-engines
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Big congratulations to Casey Moore and the whole crew on bringing home the win this weekend in Lil Gangsters at Xtreme Raceway Park. The Boostline 408 did its job, but it takes a great driver, a great team, and a lot of hard work to park anything in the winner’s circle and they got it done! Thanks for trusting Boostline Performance to be part of it. It’s always rewarding to see our customers succeed, especially against such a tough field of competitors. Congratulations again to Casey and everyone involved in the program. We’re proud to be along for the ride.
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Factory 243 and 799 cathedral port heads have earned their reputation for a reason, but there’s still power left on the table. We start with genuine GM castings and CNC port them to improve airflow, efficiency, and overall performance, enhancing what already makes these heads work so well. Check out our latest YouTube video for a closer look!
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https://youtu.be/z0aA8IUyfmM?si=gqHjoVkBi7yPuDTF
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