60/62 exhaust???

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Im running a 40 flowmaster on 2.5 inch pipe on my old 60 with a gutted cat :) . Love the sound and there was a definate performance improvement. If where you are located doesn't require emmisions I would rip the guts out of the cat and bolt it up. :rolleyes:
 
reffug said:
Im running a 40 flowmaster on 2.5 inch pipe on my old 60 with a gutted cat :) . Love the sound and there was a definate performance improvement. If where you are located doesn't require emmisions I would rip the guts out of the cat and bolt it up. :rolleyes:
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I have a Flowmaster as well...sounds good and breaths well. :beer:
 
i was going to run a single cat and have all new pipe but money is an issue and i dont have a bender. i picked up a 40 series flowmaster for about 60 bucks. just gonna replace my dead muffler for now.
 
I just went with a cat back Borla on the advice of the mechanic, he had said he was running one one his Toy p/u and noticed a difference, I thought he was blowing smoke up my ass, but figured what the hell. I have to admit, there really is a noticable difference. Sounds good, without being noticeable, and it's stainless.
 
beachedFJ62 said:
would it be ok to run with out a cat?
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Yaa. Like I said my cat is gutless. As long as you don't have to go through emissions the appearance of the part is all that is important. I don't like them cause its just one more thing to break and it causes more heat build up in the exaust, headers, and eventually the engine. :flipoff2: a cat conv. Just my 02
 
ask and ye shall receive...
This is a pic of my exit pipe, I moved it so that it would not get squashed while 4 wheeling, I also upgraded to a high flow cat, muffler and 2 1/2 inch pipe.
exhast 001.webp
 
Thanks, that's a great idea. Has anyone done a dual outlet that has pics? I was considering this, but I'm not sure if it will look better straight back or in my stock location (about a 90 degree angle at the 1/4 panel) on both sides. Thanks
 
beachedFJ62 said:
i might just go with out a cat since i live in FLA, but i guess maybe a header and just redo the whole system and bypass the cat and get a new muffler. anyone else done this??
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I'm in Florida too - headers to a dual intake flowmaster - dual output - this is on a 383 - but works nonetheless.
 
I have hte ceramic headers as well and have had them for 5 years now they came ont he truck when i bought it so i could not tell you power difference before. but looking at the stock manifold the flow is pretty strait so you might be better off putting your money into nicer exhasut parts.
Mine had a flowmster on it when I got it that roted out pretty fast. I live in a smog state so my system runs like this headers to stainless 2x2.5 pipes to 2 side by side stailess cats to a 'Y' into a dynaflow stainless muffler to 2.5 pipe straight out the back . it is all tucked up as high as it can be and straight as it can be. the custom exhaust shop I took it too told me the straighter the flow the more horsepower. the only thing i would do different next time is go with 2" down pipes. while it is nice now that i have regeared it was hard to accelerate in the 10-20mph range with the stock 4.11's
i would definately recommend going with stainless steel and going to a custom exhasut shop as well. HTH
Jason
 
This subject has been discussed ad nauseum and on the 3FE list we finally came to a consensus opinion based on lots of collective experience with FJ62 aftermarket exhaust:

- unlike 95% of the engineering on an FJ62, the OEM exhaust configuration is stupid, too complex, prone to trail damage

- a header is a waste of money for the 3FE. You will get very little performance gain and have the potential to create problems with leakage and heat. Use the stock manifold, which is well engineered and flows quite well.

- if you live in California you might have to stay with 2 cats to pass the visual inspection. In this case replicate the stock exhaust configuration through the cats, but with larger pipe, 2" or 2.25" being the consensus best size, and generic high flow cats. Otherwise use a single generic high flow cat. Replace the two oxygen sensors in the downpipes from each side of the manifold in the approximate same location that they are along the pipe from the factory, before the downpipes merge in front of the new cat. The ECU separately measures the oxygen content from the two banks of cylinders and sends separate info to those injectors, so you want them to stay separate. Again, use 2" or 2.25" pipe until you get to the cat, then 2.5" afterward

- use the muffler of your choice and bring the pipe out wherever you like. Bringing the pipe out to the side will result in louder exhaust for the driver, and more exhaust in your face when you're sitting still on the trail. Bringing it straight back will expose it somewhat more to trail damage, and if you drive around with the hatch open you will get exhaust sucked into the truck.

- go to a small custom muffler shop. Avoid the big chain muffler shops - high prices, won't be willing to do custom work as above

- tuck it all up as high as you can to avoide trail hazards

Personally, I reused the factory downpipes, new O2 sensors from oxygensensors.com, welded the the downpipes together at a junction into 2.5" pipe, then used a generic high flow cat and a generic turbo-type muffler, bringing the exhaust pipe out the side as in the picture above.
 
yooper is right, I had mine done at a small shop, great service. they took the time to listen to what I wanted and tuck it up nice and small. And I got a great price. $250 for a high flow cat, muffler, and 2 1/2 exaust from the manifold back.
 
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