Exhaust Routing

[bigge31566]

I talked to a muffler  shop today getting quotes on installing dual exhaust and he informed me that you cant run duals on driver side by gas tank, you have to crossover then switch back over, first I'll heard of this

[Irish_Alley]

i would find a different shop, maybe with the newer trucks where the gas tank is inside of the frame rails but ours is on the outside. so you would have a frame in between the exhaust pipe and tank. AND i did mine at home ran duals that 45ed in front of the rear tires. i only gave myself 1" or so of a gap and never had a problem and didnt melt the plastic tank cover, and im not the only one that has done it. i know a couple on here that will back that up

[zieg85]

I talked to a muffler  shop today getting quotes on installing dual exhaust and he informed me that you cant run duals on driver side by gas tank, you have to crossover then switch back over, first I'll heard of this

Ask the muffler shop what would happen if your truck had dual tanks???  They are clearly not competent enough to perform custom dual exhaust on any 73-87's IMO

[Irish_Alley]

i know with my cummins the muffler shop doesnt care whats best for the motor or performance, the cummins exhaust is on the passenger side. they wanted to run it down to the transmission and 90° to the drivers side right under the torque converter then 90° it again to the rear. needless to say im still running pretty much no exhaust lol. i know it can but ran down the passenger side but i havnt had time

[LTZ C20]

That is the biggest load of crap I have heard all week! It makes no difference on these trucks if the exhaust is on the right side or the left side. I have true dual exhaust on my truck, no crossover, each pipe runs straight to the back on the inside, parallel to each frame rail and I have zero issues with anything. Not even the frame that is right next to each exhaust pipe gets hot. Like Zieg & Irish said, you need to find a new exhuast shop.

On newer trucks with the gas tank on the inside of the frame, there is a cross over pipe from one side to the other at the front of the trans area, then a slightly larger diameter pipe goes from there to the muffler and then what ever the manufacturer wants after the muffler. The reason for the slightly larger pipe is that there is a combination of 2 pipes into 1, so a slightly larger diameter pipe keeps the back pressure at the manufacturers required specs. Even those models that have an exhaust pipe close to the fuel tank have a metal heat shield on the side facing the pipes.

Honestly, we don't want you too get had by someone who doesn't know what they are doing.

[Blazin]

The guy that told you that is an idiot.

[bigge31566]

How many of you run your own exhaust

[Stewart G Griffin]

i think the factory ran it on the fuel tank side, at least for 4.3 models.

i run my own exhaust right now, but it's only the temporary flex pipe until i can bring it to a shop.

[timthescarrd]

I ran my own with a Hooker kit I got on Summit Racing (Cause I have a 4x4, if your's is 2wd CAPTKAOS sells a really nice kit on this site's store) I got headers, 2 1/4" duals and a pair of mufflers for about $500 Put it up and clamped it together myself, then took it to a local shop and got it welded together for another $70

[SkinnyG]

I run my own exhaust.  I buy mandrel bent U's, and piece it all together.  I think it took me a solid day to do this one.  The cost of the U's and the time vs. paying a shop and getting crush bends: might be a wash.  But I enjoy the puzzle, and making it all fit.