BTR TRINITY DUAL INJECTOR LS3 INTAKE RUNNER - Black - TRR-3-2I-BLK Average runner length - 4.425" - Short for high boost / RPM applications Dual injectors for high-flowing boosted ethanol & methanol combinations Designed, cast, and machined in the USA Sold individually - 2 required per intake Uses -12AN FRK-2i rail kit BTR's TRInity series of modular intakes can grow with your combination's needs! If you need to assemble your own custom TRInity intake configuration, swap your TRInity to a different plenum or runner, or simply get some service parts, we have you covered.