Gutted my kitty this AM!!! - Ford Powerstroke Diesel Forum
6.0L Performance Parts Discussion What has or has not worked for you?

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Old 03-28-2009, 07:31 AM
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Gutted my kitty this AM!!!

Gettin ready for the tuner so I gutted the kitty, now I need to order my muffler delete pipe!

Didn't notice much of an improvement performance wise, prolly cause the stock muffler is still intact... I guess the muffler is just as restrictive as the cat...



Question... If I order a tip, what size fits over the 3.5"?? 4" OD or ID??? Or something different??
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Old 03-28-2009, 07:36 AM
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i got a 4" ID from magnaflow and it was a bit big on my 4" piping
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Old 03-28-2009, 07:39 AM
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Guess I am looking at a 3.5" inlet??? I am ordering from puredieselpower.com (also ordering the muff delete there) so I want to make sure I get it right...
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Old 03-28-2009, 07:41 AM
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yeah the 4" will be so big on stock piping you wont be able to crack a bead, unless your going clamp on then you might get it to work, i would go with a 3.5" diameter to 5-6" out if they have that, are you getting full exhaust anytime?
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Old 03-28-2009, 07:47 AM
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Maybe... Depends on how much I like 3.5" stock straight pipes! All I see is 3.5" weld on tips... Wanted to clamp em, but my bud has a welder so either way!
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Old 03-28-2009, 07:51 AM
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Youll like the stock straight pipe!! but if your planning on a tuner anytime, i would toss out the extra bucks and get the full t/b kit, your stock downpipe is pretty restrictive with the unnecessary bends and kinks in it, she needs to breath!!!

As for the tip, only advantage to a clamp on that i can think of is you can take it off to polish and clean it? but i personally dont like the clamp on look at all, weld on looks so much more clean!!
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Old 03-28-2009, 08:20 AM
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That's why I am modding the exhaust is for a tuner... Read there isnt a great deal of difference between 3.5 and 4" systems as long as the muff/cat are outta the picture...
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Old 03-28-2009, 08:23 AM
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not tons no, just a little lower egt's but youll be fine with the 3.5" straight pipe, and you will LOVE the sound!!
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Old 03-28-2009, 08:30 AM
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i cut my cat off & did not nottice much diff but then i cut my muffler off and ran exhaust in front of rear tire with a 5 inch tip sounds awsome.
Sounds like a jet taking off, the muffler realy woke up the turbo.
(All straight pipe is the way to go) plus its cheaper
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Old 03-28-2009, 05:32 PM
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I wish there was a hanger right after the muffler so I could dump it right before the axle... I suppose I could do that with my buddies help too!
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