Flowmaster American thunder exhaust 5.3

[Pmuia91]

Anyone have any good videos of their flowmaster American thunder series exhaust for a 2015 GMC Sierra 5.3l ? Also looking to do a 2.5 Rc and .5 in the rear on my truck. Anyone have updated pictures with a lift with these specs on stock 20inch rims ?

[07Softail]

Haven't heard the African Thunder yet... But I bet it is LOUD AS HELL!!!!

 

RT

[Pmuia91]

Sorry dumb auto correct I fixed it

[Silver ice 6.2]

Haven't heard the African Thunder yet... But I bet it is LOUD AS HELL!!!!

 

RT

Took me a little bit to figure what happend in this thread ...lmao I always enjoy a good laugh

[schmolf4]

I just had a thunderbolt(flowmaster knock off) 40 series muffler installed yesterday plus had the resonator removed, has a little drone but I'll survive as it is nothing compared to what I had on other vehicles.

[robvas]

You're to going to want to disable your AFM

[schmolf4]

w

 

You're to going to want to disable your AFM

why is that, the drone occurs when its in the v8 mode especially at lower rpm when pulling from a light

[robvas]

w

 

why is that, the drone occurs when its in the v8 mode especially at lower rpm when pulling from a light

helicopter sound

[schmolf4]

helicopter sound

dont really notice it

[07Softail]

Too me it sounds like having windows down in a vehicle and the pressure starts popping inside of the cabin until you adjust the windows at different heights. Whop....Whop....Whop....Whop....

 

RT