6.0 2500HD Flowmaster 40 series

warm start with new dual chamber muffler. 4x18 tips rest of truck is stock except for throttle body spacer. video doesnt really do any justice. The sound is so much deeper in person ... big step up from before... i have an old vid i will upload later.

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Flowmaster Product Information and Technology
Questions? Give us a call (707) 544-4761 To view these products click below: http://www.flowmastermufflers.com/?page_id=10995 Subscribe to our Youtube channel: http://www.youtube.com/user/Flowmaster For updates and new product releases, ‘LIKE’ us on Facebook: http://www.facebook.com/FlowmasterMufflersINC Follow Flowmaster on Twitter: http://twitter.com/flowmaster1 Follow Flowmaster on Instagram: http://instagram.com/flowmaster_official/ Learn more about Flowmaster's unique Exhaust product lines.

Flowmasters vs Magnaflows on my 2003 Tahoe 5.3L
The First Sound is the Magnaflow Second sound is the Flowmasters

2005 Silverado 2500HD 6.0L Super 44s
warm start on a winter day, stock manifolds, Magnaflow Hi-Flow cats, 3" duals H piped, Super 44 Flowmasters, 4"x12" Magnaflow SS tips. mufflers part #943046, tips part #35116

Sound Testing: Flowmasters 8 Hottest Mufflers
We test 8 of Flowmasters most popular mufflers for street cars to muscle cars to full blown race cars! From mild to aggressive, find out which muffler is right for your car and get that classic Flowmaster sound. SUBSCRIBE to the POWERTV YOUTUBE Channel -- http://www.youtube.com/subscription_center?add_user=powertv ***** Visit Power Automedia's Online Magazines! Power Automedia is the #1 Automotive Performance Digital Publisher! Ford & Mustang - http://www.stangtv.com LSX GM - http://www.lsxtv.com Hot Rods & Muscle Cars - http://www.streetlegaltv.com Drag Racing - http://www.dragzine.com Street Rods! - http://www.rodauthority.com Chevy Muscle Cars - http://www.chevyhardcore.com Engine Performance - http://www.enginelabs.com Corvette - http://www.corvetteonline.com Dirt Track - http://www.onedirt.com