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Old 02-20-2010, 09:44 AM
th3 th3 is offline
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turbo hiss or no?

just got a magna flow turbo back 4" straight pipe installed. on the first start up i heard alot of hissing, looked in the end of the pipe and saw some metal build up where the end of the pipe was cut with a chop saw before the tip was installed. i asked them to trim out the metal with a die grinder which they did. it cut down on the hiss but it is still there. is the hiss normal turbo noise or do i have more metal build up on another pipe section deeper in the exhaust system that needs trimming? i did notice that on a cold start, for the first second or two, the exhaust sounds deep with no hiss or whistle, then the hiss kicks in and the whistle starts to build. i think it might just be the turbo but would feel beter about it if someone would confirm it. i really dont want to take all the clamps loose to check each section end for hiss causing metal build up from the chop saw if its just nornal 04 turbo noise. by the way, the turbo whistle is awsome.
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Old 02-20-2010, 12:54 PM
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I do not have the magnaflow exhaust, but have the MBRP turbo back 4" and it sounds the same as you described. When you start it up for a few seconds has the deep sound then goes to the hiss/whistle sound. I did not have to do any cutting on my exhaust since I have a CC/LB.
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Old 02-20-2010, 05:15 PM
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that hiss or whistle is normal thats the turbo and when you get it out it it will probably get louder the sound is compelety normal i love that whistle
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Old 02-21-2010, 07:08 PM
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Yep, that's what it does.....normal!
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Old 02-22-2010, 02:41 PM
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Mine does the exact same thing. You're in good shape.
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Old 02-22-2010, 04:53 PM
th3 th3 is offline
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good deal!

i find myself riding around with the raido off and the windows down.........

kinda fun playing with the whistle.
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Old 02-22-2010, 04:56 PM
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Quote:
Originally Posted by th3 View Post
good deal!

i find myself riding around with the raido off and the windows down.........

kinda fun playing with the whistle.
Put an 03 turbo on there and you'll never turn the radio on again!
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Old 02-22-2010, 04:57 PM
th3 th3 is offline
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oh.. one more question, a magnaflo glass pack type (straight through with no damming) muffler came with the kit. will the muffler take some of the hiss out and still let the whistle thru? anyone tried it with and without to see the difference?

Last edited by th3; 02-22-2010 at 06:00 PM.
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Old 02-22-2010, 05:02 PM
th3 th3 is offline
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i have the early 04 truck with the 03 motor so ima guessin i gots the 03 turbo!
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Old 02-22-2010, 05:02 PM
DOX DOX is offline
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On the metal shaving are you talking about the little metal burs after sawing?
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