New EMSpowered exhaust thread

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Joined
May 3, 2009
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Thought I'd share some of my experience with the EMS Powered exhaust for my '94.

Large box arrived last week, following day a small box with extra hardware.
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I think most challenging part will prove to be removing old exhaust, not installing the new one.

As you can see, most of the bolts on my system were corroded and took lots of effort to remove (pb, cheater pipe, dremel cutter, etc). Since I just had the two downpipes replaced last year I was fortunate the bolts at the header weren't too much of an issue. The flange on both sides of the cats were the toughest.
 
didn't hit the upload button...
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Getting the two hanger brackets off were a challenge as well, especially the rear one. I ended up taking the entire bracket off at the frame since it was impossible to get the smaller bolts loose that are part of the rubber shocks.

Once off I had to cut the bolts to free the main bracket that needs to be reinstalled. Before I did this I confirmed with Baktash that only the main bracket frame is used with the EMS exhaust and the rubber, etc can be discarded.
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You can see on previous pic, decided to just hacksaw the section behind the muffler to get better access to the bracket.

Here are the two brackets in process of separating from rubber shock/standoff.
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Does the rear-most portion route up over framerail, or is it like factory & just go under?
 
It goes over the rear frame cross member but so did my OEM. What's nice is it doesn't have the flattened section of pipe that seems like it would be a constraint.
 
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What is the story with the two stock O2 sensor bungs before the cat? Or is that an optical illusion?
 
Maybe for the 93-94 FJZ-80's?

Exactly, I have a '94 which had one sensor in each pipe prior to entering the two cats.

Debated with myself for a while about doing the mod to remove the PAIR system and put the O2 sensors up at the manifold (EMS was happy to not weld bungs on if I didn't want them). In fact, I think you offered some advice about that back when I was looking into it several months ago. Decided against it simply because I've moved to NY I don't know how particular they are during inspections and didn't want to risk it...I can tell you they failed me last year because I didn't have the 3rd row seats installed but the belts were still in place! So had to either remove the belts or throw the seats back in to pass...so makes me a little paranoid.
 
I was amazed that I was able to get all the heat shield bolts loose except one that I sheared off.

As you can see the front most one under the passenger footwell is in pretty bad shape so have decided not to replace it. Checked dealer and found list price is about $150 so I've decided to go with shielding that sticks on. Rated to 1200 degrees so should be fine if it stays put.
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Here's the stuff I am using to replace the front most shield. It's called ZeroClearance. 21"x48" sheet for $40 from ThermalSound. The aluminum is pretty tough so in addition to the adhesive, I can secure it to the existing studs that held on the original shield.
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Great new thread!!! And thanks for all the info.I can probably speak for alot of us out there,that EMS has done a huge favor and gift for taking time and money and making us a new exhaust system.
I think they have done a awesome job and their P R was astounding !!!!!!! I will be ordering my exhaust soon! Glad to have a great company like EMS to do business with!!!
Thanks Scott
 
Used Rust Bullet to restore and protect the two heat shields that weren't too bad off.

You can see that I removed the rear heater the photo where the shield is installed. The small aluminum plate is where I plugged the hole under the seat where the heater hoses came out.
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Shields done.

Note how small new cat is compared to two of the old OEM ones.
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Have the new cat forward section in. No surprises. Did need to remove the old brace used for the old pipes (against the firewall) as well as temporarily remove the bolts for the brake lines brackets to open up the area a little to maneuver the new pipes in.

Perfect fit as far as clearing frame, firewall, etc.
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Next challenge is the O2 sensors. Since the positioning into the single pipe is a little different than the two pipe OEM setup, I felt the O2 wiring was going to be too close to the pipe. So I am now figuring out how to reroute them a bit. Shouldn't be too difficult.
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Was able to pull the outside O2 wire up from between the body panels to reroute it inside the fender well. Tucking it in beside the brake line with tie wraps worked nicely.

The other one was routed thru the frame to keep it from getting caught on anything.
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Really like having all that extra room around the cat now. Especially after living with a rattling shield around the two old cats that was impossible to work on the secure it better.

Also tucked up nicely. I won't bother to replace the side shielding that was there before since it only hangs about an inch or so below the rocker.
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