Exhaust quesiton - FMVperformance.com : The site for all your Ford Mazda and Volvo needs
 
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post #1 of 5 (permalink) Old 10-09-2009, 02:08 PM Thread Starter
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Exhaust quesiton

This is for the exhaust gurus out there.

I got rid of my 3 and now have a Chevy Colorado. I was thinking instead of getting a whole brand name exhaust kit, that I would just take it to a muffler shop and have them build me one with 2.5"/ 2.75" piping all the way through, weld it all together, and just get a flowmaster muffler and call it a day.
Will putting the piping together like that hurt the air flow and performance of the truck at all? Thats basically what borla, magnaflow, and all them do, only there kits just have the bends where it needs to be and they slapped a name on pieces of metal. Most also have their own mufflers so it give their own sound (along with resonators places in w/e areas.) Anyway, I know I could make my own, but i dont have a welder and can't weld myself. Plus, I wont leave it on there just by clamps.

This way, I will save a bunch of money and still get the sound and performance I want. The thing is a 3.5L I5, so it will sound bad ass


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post #2 of 5 (permalink) Old 10-09-2009, 03:01 PM
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Re: Exhaust quesiton

I'd only do it if you can find a shop that can do mandrel bends, otherwise your going to have crush bent exhaust, which will restrict airflow. The rule of thumb I hear is that you want +1 sizing on crush bent to get close to the same airflow as mandrel. IE 2.75" crush bent exhaust to equal about 2.5" mandrel bent. In the end the crush bending is going to restrict the flow some that going up and size can fix because it causes turbulance in the exhaust stream, where as the mandrel bends are going to keep it nice and smooth.
-Matt
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post #3 of 5 (permalink) Old 10-09-2009, 03:06 PM
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Re: Exhaust quesiton

You'll probably have to get a custom one made...and in all honesty, an I-5 will sound like terrible with an exhaust. It doesn't matter who makes it, they all sound terrible...even the original Viper RT/10 which did not have a crossover pipe sounded bad when listening to it from one side.

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post #4 of 5 (permalink) Old 10-09-2009, 03:11 PM Thread Starter
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Re: Exhaust quesiton

I've come across a couple exhausts on you tube of my trucks' exhaust and some sounds REALLY nice. Some do have something about them that I dont like, but Borla and Flowmaster are some that have a REALLY nice sound to them. If you plan on looking yourself, just make sure you find a truck with the I5 and not I4


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post #5 of 5 (permalink) Old 10-09-2009, 03:14 PM
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Re: Exhaust quesiton

I've heard a few H3s with exhaust and it wasn't great, but they could have been poorly done...as the wheels, chrome stuff, and tint didn't help the image of the vehicle.

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