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exhaust ideas for turbo foxbody

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Old 07-23-2014, 05:36 PM
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Default exhaust ideas for turbo foxbody

Currently running a 5.3 with 76mm tubonetics turbo and 4inch down pipe. should I just run a 4 inch exhaust all the way thru, or 4inches about halfway then 3inch to 3 1/2 till the muffler to create some back pressure? Im not using a catalytic converter just straight thru piping. Thanks in advance
Old 07-23-2014, 08:21 PM
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Why do you want backpressure behind the turbine?
Old 07-23-2014, 08:28 PM
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just to create back pressure due to not having a catalytic converter. But your right with boost think im going to run a 4inch downpipe and 4 inches all the way thru.
Old 07-23-2014, 09:38 PM
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With a turbo, you don't want any back pressure. Put a nice quiet muffler on it and add a cutout
Old 07-24-2014, 09:53 AM
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Just run the biggest diameter tube you can fit. Typically though 3.5" all the way back is OK. A 4" system is OK but it will be harder to route between the engine and frame rails.
Old 07-24-2014, 10:16 AM
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4" straight out the fender its a little loud but not to bad



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