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Exhaust Modification

TUF250

By TUF250,
in Engines & Forced Induction

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TUF250 Proficient

TUF250

Posted
Posted

Ok folks, I have an r33 gts-t.

Current exhaust mods are:

- Bellmouth 3inch dump/front pipe

- Xforce 3 inch cat (apparently, came with car)

- 3 inch stainless mandral bent system which also came with car. (it is jasma approved, so its quiet, one huge muffler at the rear that goes 3inch in then splits into two pipes inside and then back out with a single 3inch again, middle muffler is same brand but smaller about the size of a shoe box)

the mufflers appear so say K&H on them, never heard of them?

The car flows great, good performance, cant complain but its too quiet!

It literally makes almost no noise. It is completely drained out by the induction noise.

RB25s have a good note and I would like to get some of that without being too loud and offensive obviously.

Recommendations for a good sensible note? remove rear muffler for a cannon? different rear muffler, no rear muffler etc?

thanks

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TUF250 Proficient

TUF250

Posted
  • Author
Posted (edited)

i would but its all welded, beautiful system. It was a novelty to have it that quiet but truly it makes no noise, no different to stock system. I was thinking have the rear muffler changed to the flange (half way between middle and rear muffler) so I can change back if needed?

Not looking for police attention just a nice, crisp but still reasonably quiet exhaust note

Edited by TUF250
ClutchBurndout-:( Grand Master

ClutchBurndout-:(

Posted
Posted
i would but its all welded, beautiful system. It was a novelty to have it that quiet but truly it makes no noise, no different to stock system. I was thinking have the rear muffler changed to the flange (half way between middle and rear muffler) so I can change back if needed?

Not looking for police attention just a nice, crisp but still reasonably quiet exhaust note

i have a jasma fujutsubu canon and just a hotdog in my 3.5inch system, and its as loud as it can get before going over the allowed db, im getting a 3 inch bellmouth and highflow cat (i have stock dump/front and cat) so it will louden it up a bit! cos im after a bit more noise to, so to answer your question, since u have a similar system to mine, i think taking out the center muffler and get a hotdog (if you dont already have one) should make it sound nice.

zebra Grand Master

zebra

Posted
Posted
i would but its all welded, beautiful system. It was a novelty to have it that quiet but truly it makes no noise, no different to stock system. I was thinking have the rear muffler changed to the flange (half way between middle and rear muffler) so I can change back if needed?

Not looking for police attention just a nice, crisp but still reasonably quiet exhaust note

Just get the centre muffler cut out and a straight piece welded in.

TUF250 Proficient

TUF250

Posted
  • Author
Posted

Ok sounds good. Would be cheapish too. What about this rear muffler, would it be restrictive? the 3inch in 3inch out but with the twin pipes running through it? its a huge muffler. ill try get a pic. doing the centre would be cheaper than the rear (less bends) Also I could keep my current tip which I dont mind

SLY-25T Mentor

SLY-25T

Posted
Posted (edited)

check out my for sale thread (in sig) for my old exhaust. unique and mildly sounding. :D enough of the sales pitch.

i got a custom 3 inch made up with a straight through muffler and thats it. same sort of sound from my old one just deeper and louder. when it opens up ~4500+ it really starts to roar. i frukin love it... my petrol seems to be draining somewhere.... ;)

Edited by SLY-25T
3LGODZILA Proficient

3LGODZILA

Posted
Posted (edited)

run a decat, will be slightly louder and slightly faster, best of both worlds!

pros.

more power

more response

louder

their cheap, sell ur current high flow cat and ur infront!

ur system sounds like a quality system, this way u dont have to modify it and f**k with anything

cons.

the environment (f**k the environment)

Edited by jimmys-33T
t_revz Grand Master

t_revz

Posted
Posted
has anyone got a 3 inch system with a high flow cat and only one big muffler, what did you think if so?

3 inch dump pipe high flow cat and lukey turbo muffler 3in 3 out. no police attention but loud enough and seems to flow enough

zebra Grand Master

zebra

Posted
Posted
run a decat, will be slightly louder and slightly faster, best of both worlds!

pros.

more power

more response

louder

their cheap, sell ur current high flow cat and ur infront!

ur system sounds like a quality system, this way u dont have to modify it and f**k with anything

cons.

the environment (f**k the environment)

CONS! the $$$$$$$$$$ Worth of Ass Raping you will receive if you get caught.

TUF250 Proficient

TUF250

Posted
  • Author
Posted

yeah wont be getting a de-cat.

I wonder if just removing the centre muffler and replacing with a straight pipe would sound good? The rear muffler looks quite big and has a twin chamber type design. K&H brand. Might be a good way to go, wont cost much either i figure. thoughts?

R31Nismoid Grand Master

R31Nismoid

Posted
Posted
im in vic nismoid. I wonder if just removing the centre muffler and replacing with a straight pipe would sound good? The rear muffler looks quite big and has a twin chamber type design. K&H brand. Might be a good way to go, wont cost much either i figure. thoughts?

IMO then you are very silly to change it.

If it's quiet now, then its probably only just legal.

Changing it wil mean you are then over the dB limit almost certainly - I'm yet to see a single muffler system pass.

So you'll end up having to change back for EPA defect reasons anyway.

Stealth & silent is the new black in Vic, it's sadly the only way you can enjoy a Import with relatively low hassle.

Having it loud just simply is not worth the heartache, anyone who's battled the EPA for years (like myself), would most likely agree.

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