Flowmaster American Thunder
Senior User
Joined: Jun 2003
Posts: 435
Likes: 0
From: San Jose, CA
What series muffler comes with the American Thunder system? A lot is going to depend on what muffler comes with the system. I myself have a Flowmaster Original 40 series muffler on my truck dumped before the rear axle. The sound is great but is very loud and there is considerable resonance inside the cab. On my last truck I had the same muffler but with pipes out the back and it was a lot quieter but still louder than most. If you need a quieter muffler that doesn't make any interior noise you should check into Magnaflow or Gibson. Gibsons are more for those who want the power gains of aftermarket exhaust but don't want any of the noise.
Super Moderator
Joined: Oct 2002
Posts: 8,547
Likes: 6
From: MA
Interior resonance is synonymous with Flowmaster. I am going to be bolting up, and subsequently making some short clips of my truck with a Bassani catback within the next week. You might want to put any purchases on a temporary hold. This will be the second vehicle I have run Bassani on. They have such an awesome exhaust note, and are relatively quiet in the cab.
Thread Starter
|
Freshman User
Joined: Mar 2005
Posts: 36
Likes: 0
The system uses the new Super 40 muffler. Here is what it says in the site:
<table align="center" cellpadding="3" cellspacing="0"> <tbody><tr><td align="left" valign="center">
</td> <td align="center" valign="center"> <table border="0" cellpadding="3" cellspacing="0" width="100%"> <tbody><tr> <td colspan="2"> American Thunder "Cat-back" system for 2004-05 Ford F-150 truck with dual rear exit exhaust. Includes installation hardware, 2.50" mandrel bent tubing, new Super 40 muffler and Flowmaster's 3.00" embossed exhuast tip. </td></tr></tbody></table></td></tr></tbody> </table>
The only thing I am curious about is, if I go with this system: the sound like you guys are talking about and will it work with my 35.7 gallon fuel tank.
<table align="center" cellpadding="3" cellspacing="0"> <tbody><tr><td align="left" valign="center">
</td> <td align="center" valign="center"> <table border="0" cellpadding="3" cellspacing="0" width="100%"> <tbody><tr> <td colspan="2"> American Thunder "Cat-back" system for 2004-05 Ford F-150 truck with dual rear exit exhaust. Includes installation hardware, 2.50" mandrel bent tubing, new Super 40 muffler and Flowmaster's 3.00" embossed exhuast tip. </td></tr></tbody></table></td></tr></tbody> </table>
The only thing I am curious about is, if I go with this system: the sound like you guys are talking about and will it work with my 35.7 gallon fuel tank.
New User
Joined: Oct 2004
Posts: 7
Likes: 0
From: South Jersey
Flowmaster American Thunder Super 40's Dual
I put the Flowmaster system on my 04 Supercrew FX4 and it sounds great!!!! I have read a lot of comments from people saying it does not make much of a difference in sound, and I would have to disagree. When I drive down the road now, the exhaust sound turns heads when I hit the gas. It also sounds great when I start it up and when it is at idol. I would recommend this system to anyone!!!! 5 out of 5 stars!! 
Thread Starter
|
Freshman User
Joined: Mar 2005
Posts: 36
Likes: 0
Originally Posted by Jerzboy
I put the Flowmaster system on my 04 Supercrew FX4 and it sounds great!!!! I have read a lot of comments from people saying it does not make much of a difference in sound, and I would have to disagree. When I drive down the road now, the exhaust sound turns heads when I hit the gas. It also sounds great when I start it up and when it is at idol. I would recommend this system to anyone!!!! 5 out of 5 stars!!
New User
Joined: Oct 2004
Posts: 7
Likes: 0
From: South Jersey
It is a little louder inside the cab, but it is far from annoying. I bought the exhuast system through Summit for under $400.00
Trending Topics
New User
Joined: Apr 2005
Posts: 1
Likes: 0
I have it on mine also, it does sound sweet and when your at hiway speeds its real quite inside, of course if you get on it , you will def. here it!
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Senior User
Joined: Jun 2003
Posts: 435
Likes: 0
From: San Jose, CA
Anyone who says a Flowmaster makes no difference on the truck is deaf 
. The 40 series on my truck is relatively quiet at idle (would be louder with tips) but when I gas it (even gently) it turns heads. Has a nice rumble with gentle throttle and when you punch it it's loud and throaty but still deep. I know a lot of people don't like Flowmaster but everyone I know loves the sound of my truck. The other satisfying thing is driving in parking lots and gassing it randomly. I can usually set off a few car alarms.
. The 40 series on my truck is relatively quiet at idle (would be louder with tips) but when I gas it (even gently) it turns heads. Has a nice rumble with gentle throttle and when you punch it it's loud and throaty but still deep. I know a lot of people don't like Flowmaster but everyone I know loves the sound of my truck. The other satisfying thing is driving in parking lots and gassing it randomly. I can usually set off a few car alarms.
Freshman User
Joined: Feb 2005
Posts: 40
Likes: 0
I have to agree about Gibson. I have it on my 04 FX4 scab and it is not much louder than stock. Maybe a little throaty when you punch it but not near the sound you get from the flowmaster. Did notice a little more pep with the gibson as well.
Posting Guru
Joined: Sep 2004
Posts: 1,393
Likes: 2
I had Flowmasters on a couple different trucks and cars years ago. The only problem I had was with harmonics. At certain RPM/loads it would cause the whole truck to shake. Usually at about 1850-1950 RPM, light load. It would also do it in the garage, warming up. Made enough noise to feel through the wall in the house. Not load, exactly, but DEEP. On a Vette, at 2400 RPM (only seen around town...) the duel two chamber Flowmasters would rattle things in the cockpit. Great power, etc. Did they clear all that up? I don't get any of that with the Magnflow, but haven't used Flowmasters in more than six years.
Chris
Chris
Thread
Thread Starter
Forum
Replies
Last Post