Collector Reducers Pair 3.5 to 3in Stainless

The Collector Reducers Pair 3.5 to 3in Stainless from PYPES PERFORMANCE EXHAUST is a professional-grade transition component designed to bridge your high-flow exhaust collector to a 3-inch primary exhaust system. Built for hot rod builders, performance enthusiasts, and serious mechanics, this pair of reducers handles the critical step-down from 3.5-inch collector outlets to 3-inch diameter piping, maintaining exhaust gas velocity and scavenging efficiency while simplifying custom exhaust fabrication. Whether you're assembling a street performance engine or restoring a classic muscle car, these reducers eliminate costly custom mandrel bends and ensure a smooth, turbulence-free transition.

Each collector reducer features premium stainless steel construction with a polished finish that resists corrosion and maintains appearance through thermal cycling and road use. The 3-bolt flange inlet accommodates standard 3.5-inch collector outlets, while the 3-inch OD outlet accepts common 3-inch exhaust tubing or components. At 12 inches long, the reducer geometry is engineered to minimize flow separation and backpressure—critical factors in header and exhaust system performance. The stainless material withstands exhaust temperatures without degradation, and the polished surface both reflects radiant heat and provides the professional appearance expected in show-quality builds. This pair (two units) covers both sides of a V8 or dual-collector setup with complete symmetry.

These collector reducers suit builders transitioning from large-diameter headers or turbo manifolds into a consolidated mid-pipe or muffler system. Installation requires basic exhaust work—bolt the 3.5-inch flange side to your collector outlet, then weld or clamp the 3-inch outlet to your secondary piping. The 5.52-pound pair adds minimal weight and supports both naturally aspirated and forced-induction applications where header sizing doesn't match downstream components. Compatibility extends to custom exhaust projects on classic Chevrolet, Ford, Mopar, and other platforms using 3-bolt flange collectors. Proper sealing at flanges and careful alignment ensure no leaks and maximum system efficiency.