Catalytic converter

[luk8272]

Anyone remove there second set of converters and kept the rest factory?
I was wondering if there would be any reason to do that, or just wait until I am ready to do the full system?

[lsocoee]

people install the URD y-pipe which removes the last two cats. There is some performance gain but you also don't have to worry about people stealing your cats and doing other damage in the process.

[lsocoee]

I don't know if Kaplan is as strict as B.R. with emissions. I think B.R. checks for your last two cats.

[luk8272]

Nope they don't really care we are too small of a town takes 7 minutes to drive through on hwy 14. We only have 2 red lights. But hey we have what counts 8 bars and 5 gas stations. I'll look into that "Y" pipe.

[roxspin72]

Originally Posted by luk8272

Nope they don't really care we are too small of a town takes 7 minutes to drive through on hwy 14. We only have 2 red lights. But hey we have what counts 8 bars and 5 gas stations. I'll look into that "Y" pipe.

Selling my moded stock pipe w/no cats. Saves you money, and all you got to do is switch back to your stock if emissions becomes an issue.

http://www.tacomaworld.com/forum/buy...ck-y-pipe.html

[roxspin72]

Originally Posted by roxspin72

Selling my moded stock pipe w/no cats. Saves you money, and all you got to do is switch back to your stock if emissions becomes an issue.

Added Pics:
http://www.tacomaworld.com/forum/buy...ck-y-pipe.html

[tacoskim]

i removed my 2nd set cats with the pipe bomb and sounds good. but if your completely stock as of right now, theres other mods u probably would want to consider first before getting a y-pipe

[lsocoee]

I went for the intake and MAF calibrator first. Next will be long tube headers.

[luk8272]

Tacoskim My exhaust is factory what mods would yall recommend first.

[lsocoee]

I love the sound of an intake.

[tacoskim]

Originally Posted by luk8272

Tacoskim My exhaust is factory what mods would yall recommend first.

get a straight through muffler before u get the y-pipe. also as isosceeeee said, intake works. if u wanna go all out get some long tubes

[lsocoee]

Originally Posted by tacoskim

get a straight through muffler before u get the y-pipe. also as isosceeeee said, intake works. if u wanna go all out get some long tubes

I doubt you'd get a good performance bump by changing out the muffler.

[tacoskim]

maybe not too much performance but the engine will definitely breath alot better and wont sound as baffled once the y-pipe is put in

[luk8272]

What intakes would yall recomend? Then a MAF Cal. followed by the y pipe. I was looking at the pipe Roxspin is selling. It would remove one set of cats, If I later install the DT headers they would remove the other cats. Does the O2 sim take care of this also. I do realize his is not the urd pipes but they should suit my needs I would think.

[lsocoee]

I like my URD for ON-road use. The o2 sim is necessary if you remove the front two cats, not the rear two.

[tacoskim]

if ur gonna get the maf cal, i would do that last after all ur other planned mods, that way u only have to tune it once... if u get that first, then all ur other parts, ur gonna have to end up tuning it again.

[luk8272]

I don't really care for the TCAI. I don't want to cut in the front of the truck. I do however see that it is superior to the others. I would more likely be interested in leaving the intake the same, yet add the headers and Y pipe.

[roxspin72]

Originally Posted by luk8272

I don't really care for the TCAI. I don't want to cut in the front of the truck. I do however see that it is superior to the others. I would more likely be interested in leaving the intake the same, yet add the headers and Y pipe.

Dude here is your best bet in regards to performance bang for your dollar:

Reusable Drop in Air Filter, ie... AFE dry flow. (Your stock box is sufficient enough getting Ambient air from the fender well)

MAF Calibrator. URD basically calibrates for stock intake & or URD TCAI shipped. (So, w/your stock set up you will see improvements upon install)

After you get these two, then free up your exhaust in this order.

1) High flow Muffler or (Cat-back if desire stainless steel mandrel bend piping)
2) Headers
3) Y-pipe (if so desire)

I did not know you were completly stock when you PM'd me. I would increase Airflow to the engine first then free up the exhaust end.

[tacoskim]

^^^^^^ well said

but i would do the maf cal last, that way u only need to tune it once

[luk8272]

I am still waiting on the AFE from the Group buy. I am pretty happy with the way the trucks get their air but not so much with the way they discharge it. Sounds like a plan to me. Thanks for sharing your experiences Roxspin, Isocoee,Tacoskim.