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4.0L OHV & SOHC V6 Tech General discussion of 4.0L OHV and SOHC V6 Ford Ranger engines.

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Old 07-01-2006
Lord Of War's Avatar
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Hp

How much HP does a Flowmaster 40 series add. I am running a straight pipe into 2.5in duels. Should I put on a 40 series.

I like the sound of my truck with no muffler. If I decide to add a muffler will there be a dramatic sound lose?
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Old 07-01-2006
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Well the straight pipes made you lose backpressure which translated into lost HP, so if you put on mufflers, it'll bring it back to the stock HP, maybe +1 or 2 HP.

As for the sound, I can't say since I've never heard a straight-piped Ranger yet. But Flows are one of the loudest systems for the Ranger.
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Old 09-18-2006
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Lord of War, I tried to PM you but you have too many messages. Anyway....I kinda want to lose the muffler on my truck. The Thunderbolt system sounds OK, but I kinda want more. I want to leave my cats alone thank you.

How much power will I lose? Has anyone dynoed this to prove it? Also, what about the sound? My '97 4.0 had no muffler and I liked it. I am afraid if I remove the muffler it will lose the good tone it has and just be loud.

How do these 4.0 SOHC sound with no muffler and daul tailpipes out the back?
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Old 09-18-2006
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You'll gain sound but loose torque from a few different peoples perspectives. Trucks need TORQUE, not Horsepower.
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Old 09-19-2006
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You won't see any real benefit from the flowmaster until you get more air in by using an intake.
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Old 09-20-2006
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I just heard Lord of War's sound clip of his truck and I like it. My muffler is coming off. Nothing against the product...I just want more.
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Old 09-21-2006
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Adam I really like me set up. It has a real deep tone in low RPMs. When you wrap it up in the higher RPMs it really screams. I have noticed maybe a VERY slight drop in HP. Nothing to worry about and last tank of gas I hit 260 miles and thats with a BL and 285/75/16. I am pleased
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Old 09-21-2006
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Thanks for the reply Jake, I will be visiting the muffler shop soon I guess.
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