Flowmaster 817412 Header-back System 409S for 64-67 GM A-Body

Flowmaster 817412 Header-back System 409S - Dual Side Exit - American Thunder® - Aggressive Sound

For the person who is looking for a complete Header-back dual exhaust system with an aggressive tone. With easy fit in mind, these systems are mandrel bent for maximum performance and include specially selected mufflers. American Thunder systems deliver a moderate to aggressive interior and exterior tone and are suited to the enthusiast who wants their performance to be heard. Like all Flowmaster systems, the benefits include improved throttle response, power and mileage. Designed for an easy fit, these systems include all necessary parts and hardware for easy installation.

Features:

• Mandrel bent 16 gauge 409 stainless tubing
• Aggressive and powerful exterior exhaust tone
• Includes hangers and hardware for easy installation
• Header back system
• Premium Flowmaster quality

Product Specification:

• 2WD/4WD: 2WD
• Exhaust series: American Thunder®
• Exit Position: Dual Side Exit
• Heat shield: None
• Inlet diameter (inches): 2.50
• Material: Stainless Steel
• Muffler part number: Kit Only
• Muffler quantity: 2
• Muffler series: Super 40 Series
• Outlet diameter (inches): 2.50
• Single/Dual: Dual
• Sound level: Aggressive Sound
• System type: Header-back System
• Tip quantity: None
• Tubing diameter (inches): 2.50

Fitments:

• 1965-1966 Buick Gran Sport Base V8, 6.6L
• 1967 Buick Gran Sport Base V8, 6.6L
• 1967 Buick Gran Sport Base V8, 5.6L
• 1964 Buick LeSabre Base V8, 6.6L
• 1964 Buick LeSabre Base V8, 7.0L
• 1964-1965 Buick LeSabre Base V8, 4.9L
• 1966-1967 Buick LeSabre Base V8, 5.6L
• 1964-1967 Buick Skylark Base V8, 4.9L
• 1965-1966 Buick Skylark Base V8, 6.6L
• 1966-1967 Buick Skylark Base V8, 5.6L
• 1967 Buick Skylark Base V8, 6.6L
• 1964-1967 Chevrolet Chevelle Base V8, 5.4L
• 1964-1967 Chevrolet Chevelle Base V8, 4.6L
• 1967 Chevrolet Chevelle Base V8, 6.5L
• 1965 Chevrolet Chevelle SS V8, 5.4L
• 1965-1967 Chevrolet Chevelle SS V8, 6.5L
• 1965 Chevrolet Chevelle SS V8, 4.6L
• 1964-1966 Pontiac Grand Prix Base V8, 6.4L
• 1967 Pontiac Grand Prix Base V8, 6.6L
• 1967 Pontiac Grand Prix Base V8, 7.0L
• 1964 Pontiac GTO Base V8, 7.0L
• 1964-1966 Pontiac GTO Base V8, 6.4L
• 1967 Pontiac GTO Base V8, 6.6L
• 1964-1967 Pontiac LeMans Base V8, 6.4L
• 1964 Pontiac LeMans Base V8, 6.6L

Note: 1964 to 1967 GM A-Body with a V8 engine.