BTR Gen III HEMI Trinity Tunnel Ram Base and Runner Package

Build a custom Gen III HEMI induction system using a BTR Trinity tunnel-ram lower plenum, matching runner pair and installation hardware. Choose 5.7/6.4 or 6.2 head-specific runners, mid or long length, finish and injector layout.

This is a lower-plenum and runner package, not a complete intake. An upper lid is not included. Supply a compatible 12-bolt Hi-Ram-style upper lid, throttle body, injectors, fuel plumbing and calibration separately. No third-party upper lid or intercooler is included.

Included components

• One TRP-TNL-H natural or TRP-TNL-H-BLK black HEMI lower plenum
• Two matching selected BTR HEMI runners
• One TRHHK installation hardware kit
• One matching rail kit only when selected: FRK-10-12 for single-injector runners or FRK-11-12 for dual-injector runners

Application and assembly

Match the runners to the installed cylinder heads, not just engine displacement or vehicle badge. The HEMI lower plenum is not the GM/Ford Trinity base. Assembly is required. Verify runner height, upper-lid dimensions, hood clearance, injector dimensions, fuel system and throttle-body layout. A 6.2L supercharged-engine conversion does not retain the factory supercharger/intake assembly.

Early 2003–2008 pre-Eagle 5.7L truck heads require separately sourced head adapters; they are not included. Vehicle swaps require individual build checks. Do not assume the factory-hood clearance of a complete conventional Trinity intake applies to this tunnel-ram combination.

Availability

As checked September 22, 2026, BTR listed the natural HEMI tunnel-ram base and black 6.2L single-injector runners as backordered. Final lead time depends on every selected component. Confirm availability before scheduling installation. Natural cast components may differ slightly in shade.

Fuel-system requirements

The optional HEMI rail kits use -12 ORB connections and include mounting screws, not fuel-line adapter fittings. Supply the required fittings and plumbing separately. BTR lists Bosch-style EV1 and late Gen III HEMI injector applications; late HEMI injectors require INJ-ADPT2-8 adapters, with two sets for a 16-injector setup. Injectors and these adapters are not included. Verify injector length, seals and connector clearance with the selected runners, lower plenum and upper lid before assembly.

The TRHHK hardware pack includes O-ring seals, NPT fittings, caps and assembly hardware. Upper-lid-specific hardware and sealing requirements depend on the separately selected lid.

Shipping estimate

For checkout estimates, contents weight is provisionally 29.4 lb without rails or 34.4 lb with either matching rail kit. This uses the 9.9 lb lower-plenum catalog value, a provisional 9 lb per runner, 1 lb hardware kit and 0.5 lb packing allowance; a rail kit adds 5 lb. BTR catalog weight fields are provisionally treated as pounds. The combined carton is estimated at 30 × 16 × 16 inches with 1 lb empty-carton tare. These are not measured packed shipments; final packing may differ. No upper lid or throttle body is included in these estimates.

Vehicle references and head selection

These references identify the original engine/head family, not a bolt-on tunnel-ram installation. Every configuration requires clearance and fuel-system checks plus a separately selected upper lid.

• 2009–2023 Challenger/Charger 5.7L, 2011–2023 Challenger 6.4L and 2012–2023 Charger 6.4L: select 5.7/6.4 runners.
• 2009–2010 Dodge Ram 1500, 2011–2024 Ram 1500 and 2019–2024 Ram 1500 Classic with 5.7L HEMI: select 5.7/6.4 runners. V6 and other engine options are not included.
• 2015–2023 Challenger and Charger SRT Hellcat 6.2L: select 6.2-specific runners. This is a custom induction conversion, not an upgrade that retains the original supercharger.

Match the actual cylinder heads on modified engines and swaps. Factory hood clearance is not guaranteed. A vehicle-search match applies to the package family, not every runner choice. Other Gen III HEMI applications require individual build verification.

Compare conventional Trinity intakes

For a conventional intake with its own plenum rather than a tunnel-ram base needing a separate lid, compare the 5.7/6.4 single-injector Trinity or 6.2 single-injector Trinity. Verify fuel rails, throttle body and exact included components separately; these are different intake arrangements.