BTR Trinity LS Intake Manifold: Built for N/A and Boosted LS Builds

Caecey Killian June 3, 2025 4 min read 0

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The BTR Trinity LS intake manifold is one of the more capable bolt-on upgrades available for builders who want serious airflow without committing to a full billet piece. Cast from aluminum with a short runner, three-piece design, the Trinity is engineered to pull hard in both naturally aspirated and boosted configurations, with an operating range between 6,000 and 8,500 rpm. Whether you are squeezing every last pony out of a high-winding N/A combo or feeding boost into your LS, this manifold was built to handle the job. Pick one up direct from BTR here.

Fitment And Versatility In One Package

BTR positioned the throttle body boss in the high LT1 location, so the Trinity works with both drive-by-wire and cable throttle bodies right out of the box. The compact envelope fits tight engine bays well, including C5, C6, and C7 Corvette platforms and the F-body models that LS swappers keep coming back to. If fitment in confined spaces has burned you before on other intakes, the Trinity’s dimensions make it one of the cleaner solutions on the market.

How the BTR Trinity Seals and Why It Matters

The manifold runs two separate runners with an interchangeable plenum. Eight entrapment O-rings sit at each runner-to-plenum interface, held down by 20 stainless steel M6 socket head cap screws. That is not an afterthought sealing arrangement. The port mouths are CNC-machined for consistent airflow entry, and SAE O-rings seated in dovetailed grooves handle the seal at each individual port. For boosted applications, that level of sealing matters more than people expect until they are chasing a boost leak at 2 a.m.

Vacuum Ports And Modular Options

The Trinity includes two 1/4-27 NPT ports on the side of the throttle body boss and a 3/8-18 NPT port at the rear, so plumbing vacuum lines and boost reference ports is straightforward. BTR also sells runners and plenums separately for builders who want to mix combinations or test different runner lengths. Because the pieces are interchangeable, the Trinity gives you room to experiment without buying a completely different manifold every time you change direction on a build.

Two things worth noting before you order: natural cast finish parts can vary slightly in color from batch to batch, and the Trinity is not compatible with truck accessory drives. Outside of those specifics, this LS intake manifold covers a wide range of builds at a price point that makes more sense than going full billet for most street and strip combinations. For more on LS performance upgrades we have covered, check out our LV3 swap feature and our look at boost-proofing your power adder setup.

BTR Trinity LS Intake Manifold Specs

AboutCaecey Killian

Caecey Killian covers builds, installs, and product features for Car Junkie Magazine. He has spent years on the floor of the garage chasing horsepower across SBC, LS, and modern muscle platforms, and that shop time runs through every article he writes. His current CJM project is Project Street Reaper, a 1976 Camaro built around a fresh SBC 350. He is also known for Project Mighty Mouse, a 1977 Chevy Nova running a 1962 small-journal 327 SBC, with build coverage published across multiple online automotive magazines. His media background spans long-form build documentation, install coverage, and product features across the magazine and the Car Junkie Magazine YouTube channel. He writes the way he wrenches: specific, honest about the mistakes, and grounded in real garage work.