The Stainless Bros' 3D-printed 4-to-1 merge collector is precision-crafted from SS316 stainless steel using advanced metal additive manufacturing. The internal transition and collector geometry are optimized through fluid-dynamic modeling to minimize turbulence, increase pulse energy, and maximize overall exhaust efficiency—all within an ultra-compact package.
Designed around an ideal 15° merge angle, this collector hits the proven “sweet spot” for power: the shortest practical transition length while maintaining high exhaust velocity and low drag. The result is a highly efficient pulse-merging effect that supports strong mid-range torque and top-end power gains.
These are engineered to slip over 16-gauge SS304 tubing from Stainless Bros. SS304/SS321 tubing and bends which ensures a seamless fit-up .
