4-1 Merge Collector - 2.13" Primaries - 3D Printed

LA Fabrication 3D-Printed 4-to-1 Merge Collector

Take your exhaust performance to the next level with the LA Fabrication 3D-printed 4-to-1 merge collector, crafted from premium SS316 stainless steel using cutting-edge metal additive manufacturing. Unlike traditional billet collectors, our 3D-printed design allows for complex internal geometries that CNC machining simply cannot achieve easily, delivering smoother transitions, enhanced exhaust scavenging, and reduced flow separation.

Every detail of the internal collector and transition geometry has been optimized to minimize turbulence, maximize pulse energy, and boost overall exhaust efficiency—all in a compact, high-performance package. Engineered around the ideal merge angle, this collector hits the “sweet spot” for power: the shortest practical transition length that maintains high exhaust velocity and low drag. The result? Stronger mid-range torque, elevated top-end power, and a highly efficient pulse-merging effect that traditional billet collectors just can’t match.

Designed to slip over 54mm (2.13") OD tubing, with a total overall length of 160mm (from 54mm primaries to 2.5" outlet), this 3D-printed stainless steel merge collector is the next evolution in exhaust design for serious performance enthusiasts.