HPS STEP-AT400-500 6061-T6 Aluminum Step Up Transition Joiner 4" to 5" OD 5" Long

The HPS STEP-AT400-500 is a 6061-T6 aluminum step-up transition joiner designed to seamlessly connect tubing with different outside diameters in custom fabrication, performance builds, and industrial applications. Transitioning from a 4" OD to a 5" OD over a 5" length, this precision-formed reducer joiner is an essential component for building clean, leak-free piping systems without adapters or reducers.

Key Features:

• Outside Diameter: 4" – 5" (103mm – 127mm)
• Inside Diameter: 3-13/16" – 4-3/4" (97mm – 121mm)
• Length: 5 inches
• Wall Thickness: 3mm (approximately 0.118")
• Material: 6061-T6 aluminum — the most popular and versatile heat-treatable aluminum alloy
• Finish: Mill finish; polishable with care
• Sold in the T6 temper condition — ideal for sawing, machining, sanding, and polishing

Common Applications:

• High-performance air intake systems
• Turbocharger and intercooler charge piping
• Radiator cooling and heater system plumbing
• Custom DIY fabrication and welding projects
• Industrial, automotive, marine, and aerospace piping

Built to withstand the demands of performance and industrial environments, this step-up transition joiner can be welded, machined, or polished to suit your specific build. Note: when polishing near welds, take care not to remove excess material from the heat-affected zone.