Dual Exhaust

[Travis K]

Could someone post some pix of how they routed their dual exhaust on their 4x4? I am wondering how to run the pipe pass the front driveshaft and transfer case on the passenger side. I would like to keep all the pipes above the bottom of the frame.

[silver7]

My buddy Nick cut some steel for me according to a template he and I made to cover the hack job done on my cross member before. After welding, grinding, and a wee bit of putty, it turned out very nice.

[swamp rat]

Originally Posted by Travis K

Could someone post some pix of how they routed their dual exhaust on their 4x4? I am wondering how to run the pipe pass the front driveshaft and transfer case on the passenger side. I would like to keep all the pipes above the bottom of the frame.

You didn't mention if you have a 1/2T or a 3/4T, not sure how different the two are..

I can post a pic tonight or tomorrow how mine was done, i have a 3/4T 4X4.

I can tell you it snakes between the transfer case and frame rail, tight squeeze there were no cross brace mods done so different from the other pic's posted..

[lurch115]

kinda depends on the year/ body style of your truck too... i know i ran dual 3" on my '84 1/3 ton 4x4 and it was a little tricky but it went up and over the transfer case with kind of an "S" shape bend. i know this isn't the greatest picture, but if you look at the header/exhaust on the right side it is sitting exactly how it was hanging in the truck.

[swamp rat]

Heres the best pic's i got, ya need to dissregard my temporary fix tho as the pipe was barly clearing the case and when it idled it would rattle against it, got a little annioying so i made a home made "puller" clamp to pull it away about 1/8". It starterd doing that after about 7 years, somehow it decided to sag downward a little i guess

[drunkbus]

Here's a pic from my Blazer. Not dual all the way back but it goes through the same area up front. There is room to make it happen.

[Billhilly]

Here's a picture of mine with the cab off. There is room there. Those are 2 1/2" pipes. Ignore the pipes heading outside the chassis, I squeezed some propane tanks in.

[swamp rat]

Originally Posted by Billhilly

Here's a picture of mine with the cab off. There is room there. Those are 2 1/2" pipes. Ignore the pipes heading outside the chassis, I squeezed some propane tanks in.

Billhilly please tell me what the plan is for the round strap clamps? Gas tank? Air tank?? enquiring minds.....

EDIT: Oh yea, like the way your pipe is routed way better than my $100 rush rush under the table job..

[kwmech]

Originally Posted by swamp rat

Billhilly please tell me what the plan is for the round strap clamps? Gas tank? Air tank?? enquiring minds.....

[QUOTE=Billhilly;4220014}..................................... Ignore the pipes heading outside the chassis, I squeezed some PROPANE tanks in.[/QUOTE]

Hmmm..............

[Billhilly]

Yup, propane X 2.

[swamp rat]

Ya know i was kinda wondering about some gas tanks in the same area, but my next thought was about safety and the possibility of breaking a U joint and having the driveline smack a tank, was then thinking about a driveline cage just in case... Of course this is just thinking about possibilitys, and your build is the closest i have seen to what i was thinking. Nice!

Could i talk you out of a pic of the rear of the frame from the back too?

EDIT, Sorry for the hyjack,,

[Billhilly]

No problem. You can see my driveshaft hoop in the first pic. LPG regs down here say if you are closer than 8" to the tank you must have a hoop. Funny thing is there is no comment on how close to the driveshaft you can get. Excuse the off topic Travis.

[TheWhiteElephant]

Originally Posted by Travis K

Could someone post some pix of how they routed their dual exhaust on their 4x4? I am wondering how to run the pipe pass the front driveshaft and transfer case on the passenger side. I would like to keep all the pipes above the bottom of the frame.

I was wondering the same thing. I want to run duals out of exhaust manifolds on a '73 longbed 4X4 and was curious as to how anyone could run the pipe over on the passenger side. Seems like starter R&I would be impossible without having the pipe run too low. I, too, want to run them above the frame. How in the heck did the factory do it???

[swamp rat]

Originally Posted by TheWhiteElephant

I was wondering the same thing. I want to run duals out of exhaust manifolds on a '73 longbed 4X4 and was curious as to how anyone could run the pipe over on the passenger side. Seems like starter R&I would be impossible without having the pipe run too low. I, too, want to run them above the frame. How in the heck did the factory do it???

When i got my truck it had the passenger side cross over to the driver side then into a single exhaust, cant remember exactly where it crossed over but behind the oil pan..

[84 400]

I just ran the dynomax kit on my 77 K10. Donno if they make a similar kit for your year. Worked well. Just be prepaird for warm floor boards!!!

[Travis K]

Thanks for the pix guys. I was looking at the chassis without the cab on, and wasn't taking into account that the cab sits above the frame rail a couple inches. Anyone know how far I should keep the pipes away from an aluminum fuel cell, and if they get too close, what problems could I run into?

[swamp rat]

Donno the answer but would also like to know cause i have an alum fuel cell in route as i type.. need to rework my exhaust.

[TheWhiteElephant]

Originally Posted by Travis K

Thanks for the pix guys. I was looking at the chassis without the cab on, and wasn't taking into account that the cab sits above the frame rail a couple inches. Anyone know how far I should keep the pipes away from an aluminum fuel cell, and if they get too close, what problems could I run into?

I don't think you'll have any problems but you may want to look into putting a heat shield on the tank and/or the pipe. The exhaust systems on most new cars sit very close to EVERYTHING so they have heat shields all over the undercarriage.

[drunkbus]

How far back is the fuel cell? If it's towards the back the tail pipes won't get that hot to worry about.