Flowmaster American Thunder Header-Back Exhaust System - 2-1/2 in Tailpipe - GM Fullsize Truck 1963-66 NG Up to 70% higher energy

Up to 70% higher energy at the spark plug than stock for maximum performance

Blue Illuminated

assembled and calibrated with pride and quality right here in Boyne City

Transmission Tunnel Side Shield

Hand welded in Trans-Dapt's Whittier

Flowmaster American Thunder Header-Back Exhaust System - 2-1/2 in Tailpipe - GM Fullsize Truck 1963-66 NG Up to 70% higher energyFits 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