flowmasters
Melting Slicks
Joined: Apr 2007
Posts: 3,290
Likes: 0
From: Willow Springs IL
I have them on my 07 A&A supercharged car. I have long tubes and no cats and it drones like a son of a beeotch! 6th gear is useless because the drone is so bad at cruising speeds. (unless I'm doing 100MPH). Thay do sound good when you hammer on it though.
Race Director
Joined: Oct 2004
Posts: 13,598
Likes: 1,353
From: Home of the VOLS ! Knoxville, TN. Tennessee
St. Jude Donor '11-'12-'13, '15, '16-'17-'18-'19
I have the 17427s, with a ECS 1500 blower but no Cat delete and no headers.
I love the sound and no drone whatsoever.
They scream at wide open throttle and pretty tame at cruising speed.
I suppose every time you delete the cats and add headers you increase the chances of droning no matter what catbacks you install.
I had installed headers in my C5 back when and started to hear all kind of noises from the engine, so I decided not to do headers on the C6.
The power difference is nominal. My C6 will rip the pavement apart with my setup , and that should be plenty of power for anyone , really.
I love the sound and no drone whatsoever.
They scream at wide open throttle and pretty tame at cruising speed.
I suppose every time you delete the cats and add headers you increase the chances of droning no matter what catbacks you install.
I had installed headers in my C5 back when and started to hear all kind of noises from the engine, so I decided not to do headers on the C6.
The power difference is nominal. My C6 will rip the pavement apart with my setup , and that should be plenty of power for anyone , really.
Safety Car
Joined: Oct 2005
Posts: 3,545
Likes: 17
From: Bartlett Tennessee
I have the American Thunders on my 05 A4 .They have very little cabin drone and sound great at idle (old Muscle Car sound).They have a deeper tone and are less restrictive than the ones from the factory.
Instructor
Joined: Mar 2009
Posts: 107
Likes: 0
From: Quartz Hill Calif
Opinions seem about evenly divided on this particular thread.
I removed my Flowmasters and went back to stock. Yep, they sounded nasty alright......but the drone at cruising speed was simply unbearable. Was tired of speeding up and slowing down just to break out of the 'drone rpm'. I wish you better luck.
I removed my Flowmasters and went back to stock. Yep, they sounded nasty alright......but the drone at cruising speed was simply unbearable. Was tired of speeding up and slowing down just to break out of the 'drone rpm'. I wish you better luck.
Safety Car
Joined: Jan 2005
Posts: 4,508
Likes: 1,463
From: Pittsburgh PA
2025 C8 Stingray of the Year Finalist - Unmodified
2024 C8 of the Year Finalist - Unmodified
Even if the drone doesn't bother you.... the fit and install will. Major PITA. Even after tack welding (a must due to cheap clamps and no slits in the intermediate slip over pipes to tighten) They did not stay in place and would bang into the frame on sharp turns (less than 1/8" clearance between passenger side over the axel and frame). You get what you pay for. 
Race Director
Joined: May 2006
Posts: 12,973
Likes: 1,020
From: SOFLA
2016 Corvette of Year
2015 C6 of Year Finalist
Opinions seem about evenly divided on this particular thread.
I removed my Flowmasters and went back to stock. Yep, they sounded nasty alright......but the drone at cruising speed was simply unbearable. Was tired of speeding up and slowing down just to break out of the 'drone rpm'. I wish you better luck.
I removed my Flowmasters and went back to stock. Yep, they sounded nasty alright......but the drone at cruising speed was simply unbearable. Was tired of speeding up and slowing down just to break out of the 'drone rpm'. I wish you better luck.
I had the American Thunder Flowmasters. I loved the deep throaty sound, but my head got tired of the drone. You can control it somewhat with the paddles, but eventually I got tired of it and switched to the Corsa Sport exhaust. Love this one. It's not as deep and throaty, but sounds great at WOT, and no drone whatsoever. The Flows may be different with an M6, not sure.
David
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Melting Slicks
Joined: Apr 2007
Posts: 3,290
Likes: 0
From: Willow Springs IL
Even if the drone doesn't bother you.... the fit and install will. Major PITA. Even after tack welding (a must due to cheap clamps and no slits in the intermediate slip over pipes to tighten) They did not stay in place and would bang into the frame on sharp turns (less than 1/8" clearance between passenger side over the axel and frame). You get what you pay for.
