EvergreenToy

Do you mean it got UP TO 200 hp? Beacuse that seems very possible.

EvergreenToy

I think splitting after the muffler or cat would acomplish what I'm after. After I diagnose my ps leak im going to get these parts and make it happen. Anyone know what stock diameter is?

Yotas&Jellos

HupDogDaddy

Ok
I know everyone is always looking for more HP from the 3.0
I just like to see if everyone is paying attention

so I yank your chain

tentymes

I just cut the bottom of my air box off and put an autozone intake pipe in place of the stock and have the same results as a 200 dollar intake kit.

4x4 Runner

I put dual pipes on my 91. I welded a Y pipe after the muffler. Just make sure you get the second pipe as high over the axel as the stock pipe.
I had a glasspack but I cut it off and slid a pipe through it. So it's straight piped(besides cat) but looks like there's still a muffler! Sounded good for the 3.slow engine. Look up "1991 4runner dual straight exhaust" on YouTube to hear what it sounds like. It sounds a lot better in person!
And I think stock the pipes are 2" but don't quote me on that. Just measure your tailpipe!

ls2camaross

i have a 91 toyota pickup 3.0 5spd with a dual exhaust i just bought a single in dual out muffler n ran the exhaust out right behind the rear tires have no problem everything is still in its factory spot (muffleRo

YOTA4LIFE89

so im in the middle of the 3.4 swap on my '94 4runner and im waiting on a harness from ORS. So while im waiting i wanted to do some cosmetic/performance upgrades and exhaust is next on the list. i want a throaty sounding, slight power gain not neccessary but wouldn't mind, fairly easy bolt up maybe some fab. not much tho. somewhere in the ballpark of $200-$300. any help is appreciated.

HellRaisingYota

I have duals on my 3rd gen. 4runner with a flowmaster 40 single in dual out with 2" pipes going to 4.5 tips.

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AdmiralYoda

First....2.5" is too much IMO for even the mighty 3.0 (never mind the 22re). Mandrel bent 2.25" is perfect (and 2" is perfect for the 22re). You need exhaust velocity and scavenging. This is what helps the entire powerband and keeps the low-end torque, not overall diameter.

Too large an exhaust only helps for high rpms only and sacrifices everything else.

Think of it this way. Lets use GM trucks as an example. They have a bazillion engineers and a mega budget they throw at their design. The 2013 5.3L V8 in the 1500 has 315hp and 335lb-ft of torque. Guess what....a single 2.5" pipe.

Going to true duals on a 3.0 would be silly. Just to make it function the total exhaust area should remain the same as a single pipe system. An oversized IMO 2.5" pipe has a cross sectioinal area of 4.9". A true dual setup with the same area would use two 1.75" pipes.

So unless you want to give up a ton of ponies or sound like a civic with a trash can muffler with duals, stick with 1.75" or smaller pipes. That will look really good wont it.

Just go with a mandrel bent 2.25" system and be done with it. Best performance possible throughout the entire RPM range.

"G"

Uhm let's not use gm for an example.