1. Justin Danger

    Justin Danger Addict

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    With the new engine I want to do some upgrades to the exhaust, so I ordered a new cat. My old cat was a high flow cat, but only 1.875", so I have a new one that is 2.25". I also got a wideband o2 sensor and gauge to see how things look. My last muffler was a flowaster 50 series, and was 2" piped, I am looking to go quieter and 2.25 or 2.5". Haven't decided which muffler to go with yet, but am wondering if I could get a side exit in front of the rear fenders.
     
  2. MrDinkleman

    MrDinkleman Enthusiast

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    Won't going with a larger diameter pipe make your exhaust louder, not quieter?

    One of the members in the 1989-94 forums (forgot who) did a side exhaust that exits through the driver side bedside in front of the wheel. I like the look and may do the same. Interestingly, our pickups are constructed perfectly for it. There is a big space between the bed floor and the top of the frame rail right before it kicks up for the rear axle clearance.
     
  3. Perkolator

    Perkolator Addict

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    I would say keep it 2.25" not 2.5". When I had my 22re-t truck that's the size that was recommended to me by several shops I called around. I believe they said I'd have slight power loss at 2.5" noticeable at take-off, but might be better at highway only. It was a 4x4 so I wanted the low-end.

    On my 22re truck I upgraded things after my CAT was stolen. Had shop cut off the downpipe about a foot away from the Y and go up to 2", with a 2" high-flow CAT, then to 2.25" the rest of the way with a Magnaflow round can and out the stock position. It's surprisingly quiet for how open it is but definitely not as quiet as stock.

    Definitely possible to have exhaust exit in front of the rear axle, in my opinion it's louder than stock though even with a cat and muffler on it, I think just because it's so short and also likely because you're going to hear it more from the cab. Here's an example of a truck I've seen locally that had a side exit exhaust, his was pretty loud though, I think becuase he had the v6 and a Flowmaster and like a 3" pipe. I think owner went by NorCalSVX or something like that on YotaTech forum many years ago[​IMG]
     
    Last edited: Oct 3, 2019
  4. Justin Danger

    Justin Danger Addict

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    Oh, thats good advice! thanks man. I know a lot of the guys on the rte forums say 2.5, but yeah, I figured 2.25 was enough down to the cat. I measured the output of the CT20 when I had it out, and I believe it was 2.25". I ended up doing some research and decided that with the turbulence that a cat can cause, it doesn't hurt to expand after that. I ordered a Flowmaster 70 series at 2.5", should be a bit quieter than my current 50 series even at the larger size.

    That does look like a 3" pipe, but that looks nice. Looks like their exhaust hangs a little low though, I hope to get mike above the frame rails just in case I decide to go lower at some point.
     
  5. Justin Danger

    Justin Danger Addict

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    Fully clear on the front end now.
    20191006_134226_HDR[1].jpg

    I've started paining the "new" doors that I have had lying around. I think I will spray bed liner the interior of the door to match the dash and be wear resistant.
     
  6. Perkolator

    Perkolator Addict

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    I think his exhaust was as far tucked up as could be managed on that truck. On a 2wd you don't have the t-case in the way so in theory you should be able to tuck pretty far up there. Curious to hear the 70-series, I haven't been able to find any clips of Toyotas with the "quieter" Flowmasters yet
     
  7. Justin Danger

    Justin Danger Addict

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    Yeah, I never paid attention to the size of the new muffler when i bought it. I guess for the 70 series to be as quiet as it is, but flow so nice, it has a giant chamber. I am not gonna fit a side exhaust exit with the length of this thing. I can tuck it, but it will have to come out the back.... somewhere....
     
    Last edited: Oct 10, 2019 at 12:33 AM
  8. Justin Danger

    Justin Danger Addict

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    I brought in my exhaust parts this morning to the shop, and things are going to get welded up on Monday! let this truck breathe a little better!

    I'm not sure what this guy thought of my truck, but then we popped the hood and I showed him what i've done to the engine. He said that he was originally gonna have one of his guys do it this afternoon, but after seeing how much respect the engine got, he will do the exhaust himself and put some good care into it. That gave me warm feelings... and not just because I burnt my finger pointing out the 3 bolt exhaust flange at the end of the turbo's downturn.
     
    Last edited: Oct 10, 2019 at 3:01 PM

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