NEW - Flowmaster Exhaust Systems

[Bronco Don]

I installed my fx today also, just to loud for me looks cool with the two pipes and sounds great at idle, might be selling it for $275. I can’t ship it to big, but I live in the inland empire in Southern California.

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[Gtrekker]

I installed my fx today also, just to loud for me looks cool with the two pipes and sounds great at idle, might be selling it for $275. I can’t ship it to big, but I live in the inland empire in Southern California.

Wait for the Borla exhaust and go with the Touring sound level. It's neighborhood friendly, give a woof when starting, no drone, and doesn't get loud it you put your foot in it. I've installed them on all my trucks. They should be released soon.

 

[BlueOvalBandit]

Did the outlaw axel back, whoever said it sounded like the RS with the 2.3 was pretty damn accurate IMO. It's significantly louder than stock but that isn't saying much, stock exhuast was covered up with radio volume at 8-9. There's a little drone but with the hard top it's not bad at all.

The downside: I've had it installed for 3 days, my mileage has taken a hit.... I find myself accelerating at a spirited pace a lot more just to hear it.

 

[Sherpa11]

Did the outlaw axel back, whoever said it sounded like the RS with the 2.3 was pretty damn accurate IMO. It's significantly louder than stock but that isn't saying much, stock exhuast was covered up with radio volume at 8-9. There's a little drone but with the hard top it's not bad at all.

The downside: I've had it installed for 3 days, my mileage has taken a hit.... I find myself accelerating at a spirited pace a lot more just to hear it.

which outlaw? there's 2 axle back versions and on a 2.3 or 2.7?

 

[BlueOvalBandit]

which outlaw? there's 2 axle back versions and on a 2.3 or 2.7?

This one, I have a 2.3l, hence it sounds like an RS

https://www.holley.com/products/off-road/exhaust/parts/818125

 

[NE26]

Installed the Outlaw axle back single high clearance. Giant ugly muffler gone and sounds better than my gen2 Raptor that basically had a muffler delete all the same.

 

[Roofus]

Which would provide the best airflow if chipped?

 

[Illini_STL]

any update on 2.3l video / sound clips?

 

[mpeugeot]

Shocked by the 15% increase in fuel economy with the single outlet axle back pipe. It is loud at WOT, but very tolerable on a 5-6 hour highway drive (365 miles @ 70 MPH average speed) with 23.1 mpg on a 2 DOOR OBX 2.7 in sport mode 4A. Speeds were between 65-85 for the majority of the trip.

That's just unreal. 23.5 MPG?!? At those speeds?

 

[iamcris]

Mine sounds so very good. Worth every penny. You just can't see where all that VROOOOOM is coming from. Opened up tons of space behind the bumper for extras. 2.7, cat back, high mount, single out. Took me about 45 minutes because of OCD and trips inside the house to get tools one by one. If you're normal you can do this easy in 15-30 minutes. If not then give yourself an hour. I used two tech driver magnets to fish in the rear hangar bolts. Exceptional product.

 

[errejerre]

Installed Flowmaster American Thunder

 

[ROCKO]

@

any update on 2.3l video / sound clips?
[/QUOTE

Hey everyone! We just launched SEVEN NEW exhaust systems for both the 2.3L and 2.7L models here at Holley under the Flowmaster brand name.

American Thunder Axle-Back: This system uses a 60 Series style muffler for an aggressive exhaust tone and increased performance. Maximum dyno gains of 19 hp and 19 lb-ft. were measured at the rear wheels.

https://holley-social.com/818121AmericanThunderAxle-Back

FlowFX Axle-Back: This system uses a FlowFX style muffler for a deep exhaust tone and increased performance. Maximum dyno gains of 17 hp and 18 lb-ft. were measured at the rear wheels.

https://holley-social.com/718123FlowFXAxle-Back

FlowFX Cat-Back: This system uses a FlowFX style muffler for a deep exhaust tone and increased performance. Maximum dyno gains of 12 hp and 13 lb-ft were measured at the rear wheels.

https://holley-social.com/718122FlowFXCat-Back

Outlaw Dual Exit Axle-Back - This system uses an Outlaw style muffler for an aggressive exhaust tone and increased performance. Maximum dyno gains of 14 hp and 16 lb-ft. were measured at the rear wheels.

https://holley-social.com/818120OutlawAxle-Back

Outlaw Dual Exit Cat-Back - This system uses an Outlaw style muffler for an aggressive exhaust tone and increased performance. Maximum dyno gains of 6 hp and 7 lb-ft. were measured at the rear wheels.

https://holley-social.com/818101OutlawCat-Back

Outlaw Single Exit, High-Clearance, Axle-Back - This system replaces the stock muffler with straight pipe for an aggressive exhaust tone and increased performance. Maximum dyno gains of 15 hp and 16 lb-ft. were measured at the rear wheels.

https://holley-social.com/818125OutlawAxle-Back

Outlaw Single Exit, High-Clearance, Cat-Back - This system replaces the stock muffler with straight pipe for an aggressive exhaust tone and increased performance. Maximum dyno gains of 19 hp and 19 lb-ft. were measured at the rear wheels.

https://holley-social.com/818124OutlawCat-Back

when will 2.3 videos be uploaded with these systems?

 

[Roll Sound]

I went with the axle back Outlaw, and overall I like it. The way the Bronco motor is at startup, that is when the pipe is the loudest. This is my biggest problem with it. I feel pressure to not let my truck warm up properly before driving it, and pull it out of my space because I'm sure my neighbors can hear it. And I think the exhaust note sounds the worst at startup/warmup as well, so a double whammy. I'll keep it for a while and see.

 

[bigblueboing]

Shocked by the 15% increase in fuel economy with the single outlet axle back pipe. It is loud at WOT, but very tolerable on a 5-6 hour highway drive (365 miles @ 70 MPH average speed) with 23.1 mpg on a 2 DOOR OBX 2.7 in sport mode 4A. Speeds were between 65-85 for the majority of the trip.

That's just unreal. 23.5 MPG?!? At those speeds?

I think it’s the weight reduction I’m getting the same mpg

 

[62chad]

I got the American thunder. Sounds amazing on a cold start. Has its moments where it's a bit too honda fart can. Its not a v8 and never will be. But overall very happy. Going 70 in baja mode is awesome.

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