Chevy LS Tri-Y DLM 525 Crate 1-5/8 - 1-3/4

The Chevy LS Tri-Y DLM 525 Crate 1-5/8 - 1-3/4 from BEYEA CUSTOM HEADERS is purpose-built for engine builders and performance enthusiasts looking to maximize exhaust scavenging and horsepower gains on LS-platform powerplants. Tri-Y header designs merge individual primary tubes at strategic intervals to optimize exhaust gas dynamics, creating superior low-to-mid-range torque and peak power delivery compared to traditional four-into-one designs. This header is engineered for crate engine applications where factory mounting points don't exist, making it ideal for custom engine swaps, hot rod builds, and street-performance applications requiring a clean, tuned exhaust path from the cylinder head to the collector.

The 525 designation refers to this header's tuned primary tube diameter range of 1-5/8 to 1-3/4 inches, which balances velocity and volume for naturally aspirated LS engines in the 400–550 horsepower range. The DLM construction—featuring stepped primary tubes and a dual-merge collector design—reduces turbulence and backpressure while promoting efficient exhaust scavenging at all RPM ranges. BEYEA CUSTOM HEADERS' craftsmanship ensures quality TIG welds, precision-mandrel bends, and superior corrosion resistance, making this header suitable for both street and weekend track duty. The crate configuration eliminates factory-specific mounting constraints, giving builders complete freedom in engine placement and vehicle integration within custom chassis or swap scenarios.

This header excels in LS crate engine installations, LS engine swaps into classic muscle cars and trucks, and custom-built hot rods where OEM headers are incompatible or undesirable. Builders typically pair the Chevy LS Tri-Y DLM 525 with a quality exhaust system, tune, and intake modifications to unlock the full 30–50 horsepower potential these headers unlock on stock-displacement engines. Installation requires basic welding capability or professional fabrication to adapt the collector to your exhaust system and vehicle-specific piping, making it essential to verify fitment with your engine bay layout and suspension geometry before ordering. Weighing 32 lbs, this header is lightweight enough for competition builds yet robust enough for sustained street use with proper gasket selection and heat management.