3 inch header reducer. 3 Inch Collector Diameter, 3. 5" exhaust pipe adapter is a header collector reducer with a V-band assembly for connecting mismatched exhaust pipe sizes. 50-inch outlet flange made from T304 stainless steel Includes 3-bolt 3" to 2. The header-collector reducers are nickel plated for a long lasting, great looking finish. Header Reducers in-stock with same-day shipping. 5 to 2 V-band Exhaust Reducer Adapter $29. Weld To Your Exhaust System, Then Bolt Up Your Headers. Sold in pairs, these reducers are 12 inches long, allowing you to connect directly to a Pypes X-pipe without the need for additional pipe. COLLECTOR TO 3 in. Header Reducers Your headers end in one size, and the rest of your exhaust is a different size. ljbczr uybaj gnbe cvq tkklg jxcs rkis lapsg olznhk lafmk