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2005-2010 V6 Mustang Tech Forum

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Unread 10-31-2007   #1 (permalink)
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Default How much of a horsepower increase with new Flowmaster?

Okay, now that I've driven my V-6 with the Flowmaster single exhaust a while, it feels like it has a little more "spunk," and the wife noticed it too....About how much of a horsepower increase would any of you guys in-the-know say it gained?
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Unread 11-01-2007   #2 (permalink)
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well to be honest i wood say about 3 to 5 Rwhp at the most (BTW) Throw Some Rally Stripes On That Bad Boy Man.. Mine Dident Come Out That Bad lol Gotta Love That Vista-Blue.
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Unread 11-01-2007   #3 (permalink)
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Quote:
Originally Posted by SixBanger4.0 View Post
well to be honest i wood say about 3 to 5 Rwhp at the most (BTW) Throw Some Rally Stripes On That Bad Boy Man.. Mine Dident Come Out That Bad lol Gotta Love That Vista-Blue.
That ride is clean man nice job.

As far as the HP gain I would have to agree. Just remember that the stock mufflers are extremely restricting so I'm sure you can feel the extra hp a great deal. Good luck with them.
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Unread 11-01-2007   #4 (permalink)
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The V6 can actually pick up as much as 10 rwhp from just a muffler change. Talk about a great mod!
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Unread 11-05-2007   #5 (permalink)
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Some advertise 5-7% increase on HP...

Bone stock = 174 rwhp
C&L - CAI + 93 canned tune + JBA axle back = 207 rwhp
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Unread 11-05-2007   #6 (permalink)
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Quote:
Originally Posted by Lutzlugnut View Post
Some advertise 5-7% increase on HP...

Bone stock = 174 rwhp
C&L - CAI + 93 canned tune + JBA axle back = 207 rwhp
That's a very nice gain!
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Unread 11-09-2007   #7 (permalink)
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Get duals. and order the pipes off the internet... Or else you are gonna end up bending pipes all day long trying to get the perfect fit like I did. I started at 11am and I didn't start welding until about 6 or 7.. but she was ready for a late night spin to wake up the neighbors. :hihi:
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Unread 11-09-2007   #8 (permalink)
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Dual exhaust has shown incredibly insignificant gains over a good single performance muffler, on the 2005+ v6 Mustangs. I've got the Flowmaster American Thunder on mine and love it. At first I went from stock to a GT take-off and then to the Flowmaster. When I switched to the GT muffler, I felt a very nice increase and a little more increase after going from the GT muffler to the Flowmaster.

A lot of places claim a lot of different numbers but 10rwhp is ballpark for a muffler upgrade on these cars. They've been dyno proven to show as high as 16rwhp increases on some cars though.
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Unread 11-10-2007   #9 (permalink)
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Quote:
Originally Posted by Black05Pony View Post
Dual exhaust has shown incredibly insignificant gains over a good single performance muffler, on the 2005+ v6 Mustangs. I've got the Flowmaster American Thunder on mine and love it. At first I went from stock to a GT take-off and then to the Flowmaster. When I switched to the GT muffler, I felt a very nice increase and a little more increase after going from the GT muffler to the Flowmaster.

A lot of places claim a lot of different numbers but 10rwhp is ballpark for a muffler upgrade on these cars. They've been dyno proven to show as high as 16rwhp increases on some cars though.
WoW, man, if I got 10rwhp outta my just installed Flowmaster Am. Thunder single exhaust on my '06 V-6 then I am more than happy! :shiny: It really feels like it's got more over stock, but just how much is kinda hard to tell....
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Unread 11-10-2007   #10 (permalink)
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What you are feeling is torque, not HP. you won't feel HP until the top end.
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Unread 11-10-2007   #11 (permalink)
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You are correct, of course....
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Unread 01-29-2008   #12 (permalink)
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Dual exhuast don't do much for the V6 it is a waste of money if you are looking for performance, it looks nice but as far as increase in HP it really does not increase it by much, go with a CAI with a tune that will give you a nice HP increase about 40HP.
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Unread 01-30-2008   #13 (permalink)
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Quote:
Originally Posted by DevilNBluDress View Post
Dual exhuast don't do much for the V6 it is a waste of money if you are looking for performance, it looks nice but as far as increase in HP it really does not increase it by much, go with a CAI with a tune that will give you a nice HP increase about 40HP.

umm 40 hp for a GT maybe but definetly not a v6.... i have a CAI tune and american thunder axleback, AND headers and i doubt i even got 20 hp out of it
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Unread 01-30-2008   #14 (permalink)
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There is no CAI/tune combo that's going to yield 40hp on either car.
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Unread 01-30-2008   #15 (permalink)
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Quote:
Originally Posted by 7-UP BILL View Post
What you are feeling is torque, not HP. you won't feel HP until the top end.
Good call 7 up, torque is at the low end
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