Timinal

So I took some advice from a couple of threads and removed my resonator and bottom cat, and replace them with straight piping! Sounds real clean and is definitely noticeable performance and sound! Cant wait to get the Jpipe

TL|GTX

Isn't it 2 raspy?

Timinal

No not at all!!! Sounds a little Louder then a G35..

greco9885

iTrader: (1)

i hope u bought a race pipe instead of having straight pipe welded for the cat...that would be fucking retarded quite honestly

ssmtl2nv

iTrader: (2)

TL|GTX

He didnt take the cat out just the resonator and 3rd muffler.

greco9885

iTrader: (1)

he said bottom cat

not mid muffler

Grizzle

iTrader: (1)

hella loud

TL|GTX

ohh and he didnt get a cel?

ABP_04TL

iTrader: (2)

y would he get a CEL... when the TL has 3 Cats....

TL|GTX

lol idk, bc i thought something pluged into the cats like a sensor and if u unplug that sensor u get a cel? Wats a defouler?

Majofo

I hope you don't mean from a performance perspective.

greco9885

iTrader: (1)

thats called an o2 sensor. there are 4 of them in our cars, 2 on each primary cat coming directly off the engine. 1 before the converter, 1 after.

3rd cat doesnt gain that much performance, maybe 2-3whp

and i mean, since he said welded straight pipe for the bottom(3rd?) cat, is retarded since it bolts off

Majofo

.. If the mid-muffler is in place then it sounds like a weld at the mid muffler - straight pipe to J. I hope it was cheap.

j1n

iTrader: (1)

he probably meant mid muffler. who would weld a straight pipe in palce of the 3rd cat when you can easily replace it with a test pipe or race pipe which are bolt ons.

Timinal

I made my own straight pipe/test pipe for my 3rd cat! It has flanges on both sides so you can unbolt it! I like to custom fab my own shit because I can and their is no o2 sensor on the third cat! Some people really need to get their hands dirty sometime and look at their car... Haha

TL|GTX

Wat if i remove my 3rd cat and res, and i already removed my mid-muffler how would it sound?

AckTL05

iTrader: (18)

i just put on excelerate j-pipe and rv6 race pipe...i dont want a loud obx exhaust note..should I delete mid muffler and resonator or just one and if just one which one would sound "nice"

Timinal

I would leave the mid muffler alone

Majofo

por que?

greco9885

iTrader: (1)

cause cuting the cat out and welding straight pipe is so much better...

ballerjai

Before I put on my magnaflow resonator back in the day, I wanted to see what a straight pipe would sound also... it was RICEY as f*ck!!!

Timinal

Before anyone else talks smack!! Can someone exsplain what the hell is the difference between buying a racing pipe and me making my own...?

Timinal

I still have my stock Mid muffler and both stock mufflers and it is no where near being raspy!!!

Majofo

You making your own race pipe is not the issue.. The 3rd cat has decent flow.. The reference was because you suggested that the mid-muffler be left in, but everyone who has removed the mid has noticed no detrimental sound issues that would be described as obnoxious and you have further decreased exhaust restriction as you did with the 3rd cat removal.. so suggesting to leave it in is hypocritical..

greenga

anybody gives dyno and soundclip of variants

1. only 3d cat deleted
2. 3dcat + mid muffler deleted
3. all cats deleted or replaced on racing flame dampers + mid muffler off

+ has anybody full race system with strait parts(i mean straight flow resonator, mufflers & flame dampers or racing cats)?
want soundclip & Structure of an exhaust path

greco9885

iTrader: (1)

the majority of gains for aftermarket exhaust comes from the larger piping. 2.25 -> 2.5. since most aftermarkets dont have mid mufflers.

on the stock exhaust, the hp gains are MINIMAL. maybe .5hp for the mid muffler delete, and maybe 1.5-2 for the 3rd cat delete

greenga

you mean if there will be full straight flow exhaust the hp gains are minimal.. any dyno for example?
ok and what about sound?

do you have any example with 2,5 or 3 + dyno?

Timinal

The reason I said to leave the mid muffler in was because I'm sure the exhaust would become raspy!! From what I have moded it sounds really nice and isnt raspy..

greenga

Could anybody say the sizes of banks of any exhaust system with good sound?

Majofo

I have mid & 3rd cat removed with dynomax res.. the sound is subtle.. no rasp or rice.. nice grunt & whistle, definitely not obnoxious.

greco9885

iTrader: (1)

dynos are expensive...we are regular people, not big companys that have money for R&D

3 inch piping is WAY to big for the tl. 2.5 max