04 Rocko Taco

I've heard that the best way to go is 2.25 inch tubing for the exhaust, but I was figuring with that factory rating (overshot) of 190 hp, and the 3.4 L that 2.5 inch might be better. I've seen a lot of info on here about guys running the 2.5 inch tubes. You guys just running that after the muffler? Or after the cat? Or are you guys just welding right after the headers and collector and going 2.5 inch from there? If I'm mostly looking for sound (QUALITY, NOT QUANITY of sound) then how much difference are we talking about here to just do cat back, or do the whole thing? and is that difference worth voiding that warranty that goes away if I touch anything in front of the cat?? Thanks Guys!!

LETS SAY FOR NOW I WOULD LIKE A LITTLE POWER GAIN, BUT AM MOSTLY LOOKING FOR SOUND IMPROVEMENT....WHAT SHOULD I DO TO THIS EXHAUST? FROM THE STOCK CAT BACK. (Gotta Keep The Warranty) THANKS!!!

dfoxengr

i have 2.5 on my 96 3.4 tacoma that i made myself from mandrel bends and a magnaflow straight through 5x14" oval i believe. mild steel.
i only made it because my last muffler had a hoge hole in it and wouldnt pass inspection, but im happy with it.
it starts after the stock cat, using the stock (smaller) flange. which ill be cutting apart at the end of summer when i have time and installing a 2.5" carsound cat i have and appropriate flanges. possible a header at that time too if i can find one i like.

soulds good, not too much different than stock, and i didnt "feel" any difference.
stock on mine was about 2.35"

-derek

Elton

if you dont mind lossing a little power go with the 2-1/2''

Tanto

2.5" pipes is only recommended if you have a supercharger. Otherwise you'll be looking at a loss of power, like Elton pointed out.

04 Rocko Taco

Thanks for the advice so far guys, check the edited first post, little different question this time. Thanks!!

boraxman

Im running a 2.5 cat-back, mandrel bent w/ Magnaflow and havent noticed any power loss. Seems that I have also gained on top end

04 Rocko Taco

Hows it sound? Big and beefy?

boraxman

I really dont notice it til I get on the gas, of course I did the deckplate and ISR mods also. Im quite happy with the the whole set-up.

cootees

You should be fine to run 2.5" but limit it to that and no more. Your stock system comes with 2.25". It'll be cheaper to stay 2.25" though. The sound is mostly derived from the muffler... you don't need to alter the tubing and/or cat to get a nice tone. If a better tone is all you are searching for then just replace the muffler. Running 2.5" tubing will give you very little hp gains(probably not any noticeable). The tone will not really be a noticeable difference in sound in the 2.5" tubing over the 2.25" tubing.

Hope this helps.

UNR.Grad

If you're just going for sound, why not just replace the muffler?

04 Rocko Taco

looks like thats the ticket. Any preference? I've seen a lot of guys leaning toward the magnaflows while I've been searching around the forum. but then again everyone has to love flowmasters. I had flows on my old 03 S10, and I loved them. What do you guys think?

boogyman

i thought the flowmaster was a little too loud for my taste, so i went with an 18" magnaflow. Not too loud until you really get on the gas, then it's nice. I also have 2.5" pipe after the muffler. Haven't noticed any power loss.

04 Rocko Taco

Yeah, I dont want it to be to loud, but I do want to be able to hear it a little better at idle and stuff too. you just getting throttle response with your magnaflow? or pretty good sound at idle also?? Thanks a lot!

UNR.Grad

Check out Corey's Exhaust Page it's a little out dated now, but still has a lot of sound clips of different mufflers on 3.4's.

cootees

You will get sound with the magnaflow just not as much sound as if you had a flowmaster. Flowmasters IMO do nothing but make a lot of racket. I prefer the Magnaflow for many reasons.

Tanto

I have the flowmaster on my truck and it sounds good at low RPMs but kinda sounds like a ricer at high RPMs IMO. Doing the deckplate mod and cutting my exhaust pipe after the cat did make it a little louder which is cool with me.

boogyman

My magnaflow 18" is just a tad louder than stock when at idle. When you get on the gas is when you can hear it (although it's really not a whole lot louder than stock). If you'd like to go a little bit louder, get the magnaflow 14"-- i kind of wish I had gotten that in the first place. Those still have a nice sound when you get on the gas, but still aren't nearly as loud as the flowmasters. If you go to a muffler shop, and can't decide between the magnaflow 14" and 18", have them hold both models up to the pipe and hold a rag around the joint (that's what the shop i went to did) to hear them both before you decide.

boraxman

Heres a article on mandrel bending benifits.

http://www.bobsmuffler.com/muffler_myths.htm

ecchamberlin

Gibson makes a great sounding cat bck kit for Tacos. I had it on my 99 Taco and really liked it. I looked for a kit for my Runner but they do not make one.

ecchamberlin

Gibson makes a great sounding cat back kit for Tacos. I had it on my 99 Taco and really liked it. I looked for a kit for my Runner but they do not make one.