Opinion On Kakimoto Regu 06

[xiaorpowr]

It is an awesome exhaust and is definitely very quiet.

Seen it on few skylines, quiet as and awesome note once opened up.

I'm running Kakimoto full mega n1 which is quite similar.

Do you have both mufflers? makes a massive difference to noise levels.

Also, I think the regu came with two noise level models, one was 93db the other was 96 or 97... should check that too yo. Have a look on Kakimoto website, I saw it there (use google translator)

X

[Deano 1]

mine is really nice on the freeway and just cruising round,its quite as, when you open it up but it sounds awesome, i havnt really heard it much till my GF made a vid of me and DVS32R at the track on saturday... i was watchin the footage on sat nite and could here my car outside and thought F*ck yea that sounds wicked.... oh ive heard it on the dyno too. but nothing like peek revs on a racetrack..... : D

[Touge Kyousou]

Had a regu06 on my v35... like many have said it is quiet puttering around but loud and horn when giving it. Best exhaust i've ever had on my cars actually..

[chiksluvit]

This is a pic of the inside of mine

This looks exactly like the internal of the N1+REV cannon photo i've posted though?? the restrictor is right there..

without the restrictor, you should be able to see the perforated section inside, with lots of tiny holes on the pipe

another way to test is, use the alloy rod with the hook end that comes in the skyline toolkit, if you shove the hook end in, you can hook the end of the restrictor

if there's no restrictor, then there's nothing to hook

On the other hand, V35 with regu 06 and metal cat sounds porn

this is my mate's old car. was quiet when it only had the regu 06, but became significantly loud after he changed the Y pipe and the hi flow metal cat

for some reason 350z doesn't sound quite as nice as the v35

Edited October 6, 2010 by chiksluvit

[boostn0199]

Is the thing welded in or can you remove it somehow.

[chiksluvit]

it's welded in

see if an exhaust shop can somehow remove it for you... it looks like a bit of a mission to me

[boostn0199]

It looks like welded from the tip side so just gota somehow brake that weld, im gona see what I can do.

[boostn0199]

Just an update guys on my mission to investigate this silencer and yes it it true they are in there and yes I was able to remove it after alot of mucking around so for anyone that is interested you can take it out i used the mini air grinders because thats the only thing that would fit in there to grind the welds off then alot of fiddling around to get the silencer out of the cannon.

Ive taken some pics so you guys get an idea of what it is like.

[Raimi_R]

I've got the Regu 06&R on my r33 GTST as well. It's the quietest exhaust I've ever heard. The size of the centre muffler is quite large, which may partly explain it.

Although, in saying that, I've now got a custom mid-section (the centre muffler was taking a beating from speed humps/ other gradual undulations of terra firma) and it's still not cop-bait loud. Does scream up top though

To boostn0199, have you noticed a difference inresponse/noise of any sort from your mod?

Cheers

[chiksluvit]

How much louder did it get after the restrictor was removed?

[boostn0199]

In regards to difference well when I took my car checked with the regu06 fitted when it still had the restrictor it was definately causeing a restriction it did not like the extra timing I had in my tune from my previous exhuast and it was pinging I havent had it put on dyno with no restrictor but in regards to how it feels certainly feels alot more responsive and free revs better and seems to boost better.

In terms of noise yes it did get alot louder as suppose to before its not quite as loud as my old one which was is a stright pipe exhuast with a cannon on the back but its still much louder than it was with the restrictor so that middle muffler on it doesnt do shit lol thats why they stuck a reducer in it.

Now I see why racepace wanted 3500 for a custom exhuast that would flow and be quiet cause its not possible to find one for cheap as this kakimato has shown.

[brightmix]

loloing eewwwww

hemroids

[chiksluvit]

I've got one insalled now, can confirm that its definitely got a restrictor in there

Its probably one of the quietest exhaust i've ever had, and the sound it produces is really nice when you give it a rev

problem is now the engine won't boost past 16psi, previously set to 18psi and goes there without a problem with any other exhaust i've used. my guess is the restrictor doing its job.

at least now the missus is happy

Edited October 22, 2010 by chiksluvit

[scotty014]

i love the sound of mine on my gtr with its pops and bangs when changing and downshifting through the gears

also with the centre muffler that this system comes with that shrinks in more than the rear cannon.

if you want no restriction go with with a straight through titanium exhaust lol.

[chiksluvit]

also with the centre muffler that this system comes with that shrinks in more than the rear cannon.

if you want no restriction go with with a straight through titanium exhaust lol.

so you're saying that the perforated tube in the centre muffler shrinks from 3 inch to <2.5 inch?

that can't be right, but i'm sure there's no reduction in there, judging from Kakimoto's website

I think what you're talking about is that the 90mm piping reduces a little before it enters the rear cannon then yes, you're right, since the centre muffler entry/exit is 80mm- but this isn't even worth worrying about

We're talking about the restrictor inside the cannon, so i think you're on a different page

it's basically a silencer, but welded inside the cannon, as you can see in boostn0199's picture, and this is what is causing the restriction and not allowing the engine to boost over 16psi on my setting

it's this thing

try shoving a 2.5 inch pipe in your rear cannon when its cold, i bet you it won't get through

as much as i'd like an exhaust without the restrictor, I have no choice but to keep the noise level down, since anything straight through (muffler or not) is too loud for my setting

i hope this makes sense

Edited October 23, 2010 by chiksluvit

[boostn0199]

The middle muffler is fine I checked that out and it doesnt shrink like the restrictor in the muffler and also without the cannon the exhuast is loud so the middle muffler aint doing much it was all in the welded in restrictor that supressed the noise.

[scotty014]

are you sure it doesnt shrink because when i bought mine i could stick my hand through it but when i got to the centre muffler my hand wouldnt fit because it goes in more, then it widens again on the other side of that muffler.

[chiksluvit]

are you sure it doesnt shrink because when i bought mine i could stick my hand through it but when i got to the centre muffler my hand wouldnt fit because it goes in more, then it widens again on the other side of that muffler.

You must've put your hand in from the 90mm side, which is the short side of the mid muffler piping section from the picture

i doubt you'd be able to reach the centre mufflere if you put your hand in from the long side

the pipe inside the mid muffler is 80mm, same diameter as the piping on the long side between the cat and mid muffler

the restrictor inside the cannon is definitely smaller than 80mm, but i dont know the exact size since i can't measure it

Edited October 23, 2010 by chiksluvit

[scotty014]

hmmmm, very odd because im 100% sure that my mid muffler is a smaller hole than what the cannon muffler is. when i looked at it i could see that the rear cannon does shrink in a bit but i didnt see it as a problem because of the mid muffler being smaller. maybe the r34gtr's are a bit different? im not sure. im not disputing the fact of what your saying, i agree with what you say and what you have posted but im just going by what i saw because i installed it myself.

on another note does yours bang and pop through gearshifting or is it just a gtr thing?

[chiksluvit]

I installed my exhaust myself as well, and i'm pretty sure thats the case for R33 regu 06&R

did you do any measurements to make sure that the centre muffler is smaller than the restrictor in the rear cannon? or was that a visual estimate? the regu06 has a relatively small cannon already, so it can be a bit deceptive- the hole is actually smaller than you think-

do this test- try and see if you can shove like a degreaser spray can through the smaller section of the cannon when the car's cold, if not then you'll realise how small the restrictor actually is. its less than or equal to 2.5 inch. and no way you'd even be able to put your hand through that

the internal tube of the centre muffler is 80mm, and I'd be really worried if its the same size or smaller than the restrictor.

its definitely not the case for R33, don't know about r34 but I doubt its different

i think the "bang and pop" is more tune related

mine does it but that's because my car needs to be retuned after i changed the turbo, does it with any exhaust, just more apparent with this one because other noise frequency is already covered by the restrictor

my mate's R34 GTR doesn't do it as much because its been tuned