how much more HP do headers, and complete exhaust with intake give you? - Toyota Tacoma Forum
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#1 (permalink) Old 09-25-2007, 06:10 PM
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how much more HP do headers, and complete exhaust with intake give you?

I have a 99 tacoma prerunner single cab 4 cyl. I would like a bit more power, but adding cams, supercharger, its out my budget at the moment. So the mod I could do its to change the stock exhaust system, that means headers, magnaflow exhaust, intake. But my question is how much HP would I gain over stock? The HP for a 2.7 engine is 150, right? Also would this save a bit of gas? Thanks!
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#2 (permalink) Old 09-25-2007, 06:35 PM
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Re: how much more HP do headers, and complete exhaust with intake give you?

i would not expect much more than 5-8 hp.. you'll hear the difference, but unless your really in tune with your truck you wont notice a difference for the price of the intake and header etc, you can buy components for a nice turbo system and you will be much happier

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#3 (permalink) Old 09-25-2007, 07:12 PM
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Re: how much more HP do headers, and complete exhaust with intake give you?

On my 2000 2.7 I did the deck plate mod, NWOR header, and a custom exhaust useing the muffler from a 4.7 Tundra ( wanted quiet), I dynoed around 15+ h.p. more to the tires. FWIW, When I was stock my Dyno run was 105 h.p. +/- . The "150 h.p." is at the crank. Also, manufactures have a % that they can be off on h.p. ratings. I have seen stock 2.7's dyno 99 h.p. and up to 108 h.p.
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#4 (permalink) Old 09-26-2007, 11:21 AM
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Re: how much more HP do headers, and complete exhaust with intake give you?

on my 2.4l with a full exhaust and intake with 18's and big tires(235/50) i dynoed 135/147 not sure if that helps any b/c i didnt do a stock dyno

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