Flowmaster American Thunder Header-Back Exhaust System - 2-1/2 in Tailpipe - GM Fullsize Truck 1963-66 1128604 The carb mount flange accepts

The carb mount flange accepts both square-bore and spread-bore carbs for Cobra Jet applications

1966-1972 Fargo W100 Pickup

bolted to the harmonic balancer

D shaped Runners Promote High Flow Rates W/O Turbulence

Flowmaster American Thunder Header-Back Exhaust System - 2-1/2 in Tailpipe - GM Fullsize Truck 1963-66 1128604 The carb mount flange acceptsFits Both Long And Short WheelbasesDoes Not Fit Trucks with Torsion Bar Front Suspension or X Frames 2. 5 Inch Mandrel Bent Tubing Improves Exhaust Flow for Better Performance Super 44 Series Mufflers Give You a Deep, Classic Muscle Truck Sound H Pipe Style Crossover Pipe Improves Performance and Reduces Interior Sound Includes all Necessary Hangers and Hardware for an at Home Installation 409 Stainless Steel Construction adds Corrosion Resistance and