Vibrant Performance 10302 4-into-1 Merge Collector
Updated June 12, 2026
The Vibrant Performance 10302 is a 4-into-1 merge collector designed to join four primary exhaust tubes into a single outlet for header or custom exhaust systems. Constructed from 16-gauge 304 stainless steel with back-purged TIG welds, this collector is ready to weld with little to no preparation. The 1.75-inch slip-over inlet accepts 1.75" primary tubes, merging into a 2.5" outlet with a 3" transition cone, providing smooth flow and reduced backpressure for improved engine performance.
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How It Works
This merge collector consolidates exhaust gases from four individual header primary tubes into one larger diameter pipe. The gradual transition cone minimizes turbulence and scavenging losses, helping to maintain exhaust velocity and improve torque and horsepower. The slip-over inlet design simplifies welding by allowing tubes to slide inside the collector before being welded in place.
Installation Notes
The collector is designed for welding and requires no special prep—just clean the mating surfaces and tack-weld. It is sold individually and can be used with standard exhaust tubing and adapters. Ensure proper alignment and support to avoid stress on welds. Suitable for custom turbo or naturally aspirated exhaust systems.
Common Failure Symptoms
Potential issues include exhaust leaks at the weld joints if not properly sealed, or cracking if the collector is subjected to excessive vibration without adequate bracing. Inspect welds regularly for signs of fatigue or discoloration. A properly installed unit should last the life of the exhaust system with no issues.
