Anyone done it? Got pics?

I'm getting to the point in my RJ350 swap where I need to start thinking about this...

I want to go with Dual Flowmasters with a crossover, but every time I crawl under the Heep, I wonder where the hell I'm gonna put it all...

Thanks,
Jake Harsha

I did when I had my SB 400 installed. I used Headman headers, Flowmasters no corssover. The reason I was able to get everything to fit properly was having a fuel cell in the tub.

No Need to comment on the :rainbow: zip ties. It was a JOKE that one of my friends was playing.

http://community.webshots.com/rz/r1/1/28/34/28512834MtBAnfHzXp_ph

http://community.webshots.com/storage/1/v2/8/40/81/30384081VLKbDGhVZc_ph

http://community.webshots.com/storage/1/v1/2/44/44/30824444wUibhEZXfc_ph

I swapped engines again, this time to a 305tpi, so I'll be re-doing everything again for the umpteenth time.

Jeeper

I did single 3" with a flowmaster Delta-Flow in mine. It sounds good, loud, but good. I used Hedman headers for a YJ and ran the drivers pipe up and around the sump of the oil pan and my Y-pipe is right below the collector of the pass. side header. Dual would be a much tighter fit, especially if you have a 20 gallon gas tank. Earlier YJ's with the 15 gallon tank would be much easier, unless you use turn-downs. I like my setup but I don't like headers so I have '93 corvette exhaust manifolds to put on it when I get time (center dump). That or get center dump headers. Dual will be tight, especially with the crossover.

Thanks Jeeper, but it doesn't help much 'cause I still have my stock gas tank... I was thinking of maybe piggybacking two 2-1/4 pipes on the passenger side where the stock pipe exits... Maybe I'm dreaming...

You could do that, but it would hang pretty low. I have the 3" coming out the back of mine, it's angle cut, and the bottom is still smashed in. A friend has duals on his CJ-7, you could do it this way if you relocated your shackle hangars under the frame like a CJ-7. That would leave enough clearance to run the pipes between the springs and frame, angled out.

Originally posted by BlueJeep
You could do that, but it would hang pretty low. I have the 3" coming out the back of mine, it's angle cut, and the bottom is still smashed in. A friend has duals on his CJ-7, you could do it this way if you relocated your shackle hangars under the frame like a CJ-7. That would leave enough clearance to run the pipes between the springs and frame, angled out.

I measured and it looked to me like they could still be kept well above the lower shackle bolt if I kept 'em real tight (I have +1.25 Conn Ferr Lift shackles which are, of course, 2.5 inches longer than stock, so that helps a lot).

My biggest concern is getting both pipes bent up around the area above the rear axle tube so as not to get smashed by it when the suspension flexes. They're going to have to run paralell there and then switch to piggyback for the last two feet or so next to the gas tank... It's gonna take some fancy pipe bending, but I don't think it's impossible.

I was planning on having one muffler in the stock location and putting the other further up the line in the area that used to be occupied byt the cat. It would be behind the skid plate, and therefore well protected...

Since I'd be running them paralell already it would probably be easiest to add the H-pipe right before the first muffler--probably in front of the Skid plate a bit or right behind the lip of it if I'm lucky...

I just wish I had a picture to show the guys at the exhaust shop so they'll have a little more to go by... Someone MUST have gone down this road already... Maybe I should ask on JU or something...

Thanks to everyone for the responses (so far) :D

Jake

i am about to do the exhaust on my yj also. my probelems are i have a chevy front axle and a clocked d300. i dont think i will be able to put a pipe on the passenger side. i think i will have to bend it around the oil pan over to the drivers side then run the 2 pipes parallel down the drivers side frame rail. then once i am behind the transfer case i will make a 90 and put the mufflers above the d shaft as high and flat as i can. then both mufflers will prolly dump out the passenger side with a turn down bolted right to the mufflers.

Originally posted by yjtj
i am about to do the exhaust on my yj also. my probelems are i have a chevy front axle and a clocked d300. i dont think i will be able to put a pie on the passenger side. i think i will have to bend it around the oil pan over the drivers side then run the 2 pipes parallel down the drivers side frame rail. then once i am behind the transfer case i will make a 90 and put the mufflers above the d shaft as high and flat as i can. then both mufflers will prolly dump out the passenger side with a turn down bolted right to the mufflers.

... Jeeze, and I thought I had it bad... :D

At least my front driveshaft will still be on the right (by which I mean, correct) side. :flipoff2:

Jake

what helps me is i have lots o lift and the rear axle is moved back 3 inches so i have that area above the rear d shaft.

Lift definitely helps. With mine, I have a springover and 2" Skyjackers, so I was able to come out of the muffler and bend around the gas tank without having to go up at all. I didn't have to make the rear axle "hump" because with the 38's and my bumpstops, the rear axle never gets that high. That made it a lot easier for the exhaust shop.

Did you guys consider doing a dual in-dual out muffler? Danny Cloud who owns Down and Dirty Offroad in Tulsa did this with his, and runs parallel pipes into the muffler and parallel turndowns after the muffler.

Another thing to consider is what you'll have to access after the exhaust is in. Mine, for example, is a Bit@h to get at the tranny cooler lines because my Y-pipe is right there. Thankfully, I don't have any pipes on the drivers side because of my front driveshaft and shifter cable. Fuel lines are also run down the driver's side on a YJ.

Some things to think about. I'll see about getting a pic of mine tonight to post.

with my 350 i ran some AA headers and 2.5" pipe straight back thru my skidplate on each side of the tranny and t-case and attached the mufflers right behind that and then dumped them about a foot back and angled them down and out. no problems yet. im running Flowmaster delta force race mufflers from Summit. nice and cheap! and loud!!:D

I just finished my exhaust, 350 with block hugger headers and dual 3" pipes and Hooker aerochamber mufflers. one side follows the stock routing and the other side is really tight between the clocked d300 and the frame rail. it would have been easy without a tracbar, but I had to mount one of the mufflers above the tracbar and therefore had to notch the tub a little. both pipes exit alongside the rear shackes. I should have taken a picture but I just put the tub back on it yesterday. anybody want to do some wiring?

I have a SBC, NV4500 and Atlas in my CJ-7 with 3.5" below the frame so things are pretty tight in there. I run Dual 2.5" pipes with Flowmasters and they exit out each side behind the tires. I am SOA with 6" springs. To make things worse I run a High angle Driveline brake and a Traction bar connected to a GM 14 bolt and stock gas tank. I use 2.5" outlet blockhugger headers. I will snap a few pics in a couple of days, the Jeep is still in my buddies shop while we build the cage..

It will fit, you just need to find somebody who is GOOD with the tubing bender..

Pics guys! Pics!

:D
Thanks,
Jake

Originally posted by TPIJeep
I am SOA with 6" springs.


:eek:

Okay, here are your pics...

http://www.tpijeep.com/CageExh_008.jpg

http://www.tpijeep.com/CageExh_006.jpg

http://www.tpijeep.com/CageExh_007.jpg

More at TPIJeep.com (http://www.tpijeep.com/duals.htm )

I'm putting that 350 TBI (stock manifolds) in my YJ, NV4500 and drivers drop EB D20. For ease of installation, and due to the fact that I will probably be going with a D300 sometime in the near future (so I will have to redo everything anyway), I am going with one muffler/tailpipe in the stock location. I'm keeping a cat.

For single exhaust off a 350 TBI, what diameter would you recommend (keeping torque in mind)? 2.5" or 3"?

I'm getting a Flowmaster 40.

Thanks,

Charly

Originally posted by Charly

For single exhaust off a 350 TBI, what diameter would you recommend (keeping torque in mind)? 2.5" or 3"?

I'm getting a Flowmaster 40.

Thanks,

Charly

3" and try to keep the sharp bends to a minimum....