obsolete
obsolete GRM+ Memberand Dork
7/9/23 8:04 p.m.

I've noticed that the U-Pull yard charges $11 for "exhaust parts" which is anything that isn't a manifold or a cat. So midpipes, resonators, mufflers, etc. are all fair game. Since I'm up north, I wouldn't want to bother with non-stainless exhaust off a U-Pull car, but I think at least some cars are using 409 stainless nowadays. Does anyone know of a good donor for a decent length of 3" pipe, and/or a couple bends? Maybe a late model truck?

Patrick
Patrick GRM+ Memberand MegaDork
7/9/23 9:14 p.m.

Gmt800 trucks and same era vans have 3" stainless pipes factory. Still have a 6.0 van tailpipe behind my garage for challenge use. Pulled from a 311k mile 2007 van and sitting outside since 2017 no rust

Pete. (l33t FS)
Pete. (l33t FS) GRM+ Memberand MegaDork
7/9/23 9:37 p.m.

A lot of GM trucks are 3" and have nice mandrel bends.

obsolete
obsolete GRM+ Memberand Dork
7/10/23 1:36 a.m.

In reply to Patrick :

You mean GMT800? I had an early GMT400 and its exhaust was neither 3" nor stainless, but they could've switched over later, I guess.

Thanks for confirming my suspicions though, guys. Will be on my shopping list next time I go.

WillG80
WillG80 GRM+ Memberand Reader
7/10/23 8:20 a.m.

Check out the diesel trucks. They usually have larger diameter pipes than the gas equivalents. 

Patrick
Patrick GRM+ Memberand MegaDork
7/10/23 8:33 a.m.

In reply to obsolete :

Yeah i was tired. Gmt800. The v8 gmt360 may also, I know the pipes are stainless but forget if 3" or not. The only reason 99+ GM trucks ever need exhausts replaced is because people put loud aftermarket kits on that aren't stainless then get stuck in a loop of rust and replacement. The originals outlast the trucks 

Floating Doc (Forum Supporter)
Floating Doc (Forum Supporter) GRM+ Memberand UltimaDork
7/10/23 8:50 a.m.

In reply to obsolete :

I agree, my 88 Silverado definitely is neither stainless or 3 inch. 

SkinnyG (Forum Supporter)
SkinnyG (Forum Supporter) PowerDork
7/10/23 11:00 a.m.

Any reason you discount stealing some 4" off some brodozer?  A single 4" flows more than dual 2-1/2" (granted, less than dual 3").

obsolete
obsolete GRM+ Memberand Dork
7/10/23 12:34 p.m.

In reply to SkinnyG (Forum Supporter) :

A modified diesel truck is going to be a pretty rare find in a U-Pull around here, and likely to be rapidly picked apart by a crowd of brozoder enthusiasts. If I happened to find one, I'd be temped to buy the exhaust on principle, though!

obsolete
obsolete GRM+ Memberand Dork
7/10/23 12:43 p.m.

Darn, the Walker exhaust diagram from RockAuto shows the pipe diameter on GMT800s as 2.75", not 3":

obsolete
obsolete GRM+ Memberand Dork
7/10/23 12:52 p.m.

Ah, it's gotta be the 6.0L or the big block. Then you get the 3" system:

Duramax trucks also appear to be 3".

kevinatfms
kevinatfms HalfDork
7/10/23 1:12 p.m.

Ford Expeditions/Navigators from 2007+ all had 3" piping and some of the later ones had a nice 3" straight through bottle style resonator at the tailpipe. They were also T409 and the 2011+ versions were coated in some black rust proofing that holds up really well in harsh environments.

Patrick
Patrick GRM+ Memberand MegaDork
7/10/23 1:56 p.m.

In reply to SkinnyG (Forum Supporter) :

Stolen parts are in budget at FMV, less budget hit to buy at the junkyard 

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