New headers and Y-pipe?

Ok what i'm looking at doing is getting headers and a new y-pipe. I did the cat back exhaust already and cold air intake but would like to grab some more torque! I've been searching for a new y-pipe and couldn't find a thing. Also I was looking for TRD headers but no luck. My rig is a 2004 Dbl cab Prerunner so i have the 3.4L. Any suggestions would be great up for all kinds of ideas. Thanks

 

I am looking to basically do the same thing to 02 double cab this summer. Could use some help as well. I know I would like to start with the TRD headers and not sure about much after that as far as the "y" pipe. I have heard some good things about the flowmaster exhaust after that.

I replaced headers on an old chevy pick up in my teens. I remember going through at least a can of liquid wrench and spending the better part of the day trying to get those old bolts loose and off from the header. Anything else to the dismantlement of the old headers? Any tips when I attempt this as well
would these fit on my 02 tacoma ? http://toyotapartspeople.com/search...232706&year=00&productdesc=TRD+Exhaust+Header
good luck on this mod. keep us posted.

 

Thanks man i looked at that link and i'm for sure gonna do that. I couldn't find any reviews though. Has anyone on here done this mod?

 

Wow!!! Prices have dropped a lot on these.

1. Install is a major PIA. To remove the stock system, you either have to cut it or drop the motor and trans to get the crossover pipe out.
2. Install requires welding....I forget exactly...either a new flange on the cat or relocating the current one.
3. There is no separate Y-pipe.

I ran a Gibson exhaust on mine and loved it.

 

What do you mean there is no separate y pipe? also i have a Gibson cat back exhaust and i love it just want some more power!

 

A Y-pipe typically connects the two headers as in Gen II's. This system incorporates it in the design. Look at the pic in the link above.

 

Sweet man yeah i see it now was the welding a PITA

 

Not for me. I bought mine and then discovered I needed to weld them and I don't own a welder. In the end, I had my dealer do the install. Well worth the money IMO.

 

so as you have to drop the engine to install headers? If the old headers and y pipe are being replaced by an after market set than just cutting the old one up in a few well placed areas would help with the removal of the old stock system and avoid having any need to lower the engine.

 

Yeah sounds much easier to just cut it out to me

 

I did the TRD Headers last summer and it really wasnt too bad. The only thing that I do reccomend is not try and save the stock manifold. Just hack it up in about 2-3 spots and take it out. Its not worth the time.
After that, the Install is pretty easy. just make sure you take out the studs too or else the headers wont fit, its kind of a tight squeez.
Oh and there is welding needed, A new flange needs to be welded to the cat. It can be tricky, I just had my dads buddy do the welding bc I cant.

 

I had the dealer install a set when they had the truck apart for a re-frame. Figured if I was going to keep the truck for awhile might as well add some go to the deal. The welding is to replace the front flange on the front cat, because the TRD Y-pipe is longer than the factory one. I saw that several of the studs had been replaced with bolts, thought that was because they had broken some but now I know otherwise. The headers did add some to the mid-range 2500-4000 RPM, the speedo starts to move a lot faster than the tach in that range. I also added an Airrad intake tube and the teflon Throttle Body gasket from LC Engineering, to try and increase the intake flow to match the exhaust.

 

Awesome when i get back from my deployment I am for sure going to do this. In the instructions does it state the fact that the cat needs a new flange welded on it?

 

Yep! it does.