1962-1970 Performance Muffler Flowmaster Stainless Steel crown-automotive Exhaust Series: American Thunder

Exhaust Series: American Thunder

Also Fits GMC Sierra 2500 HD

1979-1980 GMC C1500 400 CID

The system is finished off with a pair of large 4

1962-1970 Performance Muffler Flowmaster Stainless Steel crown-automotive Exhaust Series: American ThunderOverview: Super 10 Series 409S stainless steel, single chamber mufflers. Intended for customers who desire the loudest and most aggressive sound they can find. Because these mufflers are so aggressive, they are recommended only for off highway use and not for street driven vehicles. These mufflers utilize the same patented Delta Flow technology that is found in Flowmaster's other Super series mufflers to deliver maximum performance. Constructed of 16