Headers - IMCA-UMP Northern Sport Modified - 1.625 in Primary - 9 in Long Collector - Steel - Black Paint - Small Block Chevy - GRT Chassis - Pair Brand-BEYEA CUSTOM HEADERS MPN IDM602-NSM-G . **NOTE: 9in Long Collector w/10in Long Turndown Fits Arrow, BMS, Elite , Flexi Flyer , GRT , Hoffman , Quick , SSR , TDR , TRC , Truck Freight NO