Down pipe
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Senior User
Joined: Dec 2012
Posts: 161
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From: Laramie,Wy
Down pipe
What size down pipe would I be able to run without having to change my firewall. Or vary minimal changing. What are the pros and cons of going to a larger down pipe. Thanks
Fleet Owner
Joined: May 2009
Posts: 21,437
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From: Gilbert, PA
The pros are a faster spool and lower EGTs.
Cons... being the pinch weld
Postmaster
Joined: Dec 2012
Posts: 2,604
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From: Fort Polk Louisiana
With a 2 piece DP, it makes a nice transition from a 3"DP into the 4" out, if you want to go that route. I think Clay(Riffraffdiesel) offers one that goes to 5" out, but that's a huge exhaust!
Cargo Master
Joined: Mar 2010
Posts: 2,227
Likes: 149
From: Higginsville, MO
3 inch is a big as it goes without a cab lift.... I have the Diamond Eye 3 inch downpipe into the 5 inch downpipe back exhaust system.... also made by diamond eye.... very large and very expensive but i sure like the way it sounds..... man does she roar.
Postmaster
Joined: Dec 2012
Posts: 2,604
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From: Fort Polk Louisiana
Where do you have your exhaust come out at? I saw the 5" kit, but I was thinking that it might be way too much exhaust for me..
Cargo Master
Joined: Mar 2010
Posts: 2,227
Likes: 149
From: Higginsville, MO
It comes out to a 6 inch tip at a 45 degree angle on the passenger side behind my mud flap, I have a thread in here about duraflap mudflap installation, theres a pic of it in there i believe, photobucket isn't loading up for me to reuse the pic.
Postmaster
Joined: Dec 2012
Posts: 2,604
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From: Fort Polk Louisiana
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Cargo Master
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From: Higginsville, MO
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Cargo Master
Joined: Mar 2010
Posts: 2,227
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From: Higginsville, MO
might be normal might not be who knows but my ol lady says she can definitely see a connection between my happiness and whatever is going on with my truck haha trucks been gone for two weeks and she says I've been unusually irritable ha
Postmaster
Joined: Dec 2012
Posts: 2,604
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From: Fort Polk Louisiana
Tell me about it. My ex hated the fact I liked working on my truck, said it took away from "us" time. Oh well, she's out of the picture, but not because of my truck! I would have found a way to make it work with that. My packages from Clay should be arriving tomorrow, so by this weekend, or early next week, I'll have a few more parts ready to get stockpiled in the closed waiting to get thrown on the truck!
Cargo Master
Joined: Mar 2010
Posts: 2,227
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From: Higginsville, MO
Lol my ol lady swears I love the truck more than her, which isn't true by any means but I can't sit still, my mind is always going and I like to be physically active, and with my new office job the only time I get to be active and fully engaged is on the weekends in the shop with the trucks. She understands that to a degree and I make time for her as well but no one would like me if I didn't have my truck to work on, I go stir crazy being cooped up in the house between 7 and 9 a.m. on a Saturday morning waiting for my buddies to get around so we can figure out what we're working on for the day.
Junior User
Joined: Sep 2014
Posts: 68
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From: Green Bay Wisconsin
Working on the truck gives her a break... Lol I get the same thing "go work on your damn trucks your driving me nuts."
Postmaster
Joined: Dec 2012
Posts: 2,604
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From: Fort Polk Louisiana
Haha! Well I just need to find a country girl, who likes to get her hands dirty, and join me working on the truck! That, and I did love my ex, but she thought my family hated her, when in all reality, christmas just wasn't the time to bring your ex, and her 2 kids on leave with you. Maybe a military girlfriend wasn't the best idea in hindsight.
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