Magnaflow Mufflers

[Evil]

How is it on your car?

<{POST_SNAPBACK}>

it's loud but not too loud... it got a little quiter after i put my split dump / front pipe / high flow cat on...

[siksII]

i have a 3inch front pipe, 4inch magic cat, and hks super megaphone catback, it has a large straight through 3inch muffler and is one of the quietest i have ever heard on a skyline.

edit: it also has a straight throughhot-dog style thing in the middle of it, but no real centre muffler.

Edited January 10, 2006 by siksII

[Bobjones]

Please do.

And maybe if you could take a little video like I'm going to take tonight, that would be cool also, that way we can hear it too.

<{POST_SNAPBACK}>

Going to Willowbank tonight so hopefully I can meet these requests!!

[Bass Junky]

Cool

I've done mine, just with a digital camera out the front of work.

Just giving it a little rev.

what's your e-mail?

[lordsnipe]

Post em up here, I'd like to have a little listen!

[Bass Junky]

It's a WMV, so if you have to change the file extension, change it to that.

VROOM VROOM

BASS OUT

Bass_Junkys_R34_Power_Getter_Exhaust_Sound.wmv

[lordsnipe]

sounds awesome! but i can understand why you'd want to quieten it down.

[Bass Junky]

cos it's super loud

Mostly because of the cat though.

[lordsnipe]

would a cat louden an exhaust that much? wouldnt of thought so.

if so, get a stocker 2.5" cat to quieten down the sucker

[Bl4cK32]

ive got a 3" front system, with a split 2 x 2.5" after the "race cat pipe" to the rear with 2 x 3" mufflers.

Its one of the quietest exhausts i know, and doesnt drone. Its also mild steel.

if you want a quiet exhaust, make it out of mild steel. You will sell your car before the exhaust rusts off...

I followed the ford exhausts...why? Because they have 4lts, and a gt35r to shut up. And they did it with a split system...

Cats and mid mufflers dont mean jack to quieten an exhaust...

Edited January 12, 2006 by Bl4cK32

[Bass Junky]

Well, when I the workshop put the race cat in, dB skyrocketed

[benm]

(R32 GTR, 330awkw)

I have:

HKS Exhaust Manifold

HKS Front/Dumps

DoLuck Cat + Cat-back with a 6" Canon

I got it tested last week and it was 120db at 3,500rpm. Not only was it extremely loud at idle (have Tomei Poncams too) but the drone was ripping my ears apart (especially when i'd done 4x 250km highway drives in the first 2wks).

I got a local exhaust workshop to replace the rear DoLuck canon (straight through pipe with baffling around the outside of the pipe) with 1 of their own. Their was a flange (4 bolt grr) right infront of the rear canon so it was just a matter of adapting the custom muffler to a 4 bolt flange and swapping it over (also had the entire cat-back raised 3-4cm). The result was 98db at 3,500rpm and absolutely no drone at all which is still way over the limit but i'm not sure whatelse could be done without making the car undrivable.

The annoying thing about this custom rear muffler was that its taken away the awesome "worked RB26" sound and also my power/boost is way down. I changed the rear custom muffler back to the DoLuck canon yesterday in the garage, pain in the ass 20min job. No point going to the drags with half your power stuck in the rear muffler.

I'd really love to get a whole new cat-back that is 1) 90db or less and 2) capable of flowing 330awkw but unfortunately I don't think it is possible. Having a 4 bolt flange on the entire system makes it very difficult to just swap over individual parts with other brands/models to see the difference as basically every but needs to be custom welded.

Edited January 12, 2006 by benm

[Bass Junky]

What diameter is the piping?

[benm]

the Cat-back system is 3"

[siksII]

if it was that much of an issue why not just get the exhaust shop to cut and weld on new normal flanges on while it was there? then u could fiddle easy in the future if thats what you want..?

[funkymonkey]

Hey ppls.

I got EPA’d again.

You suck at teh not attracting attention to yourself.

That is all.

Maybe you should cut down on those bootycalls to adz's place in knox..

[silva33]

Bass,

Talk to your tuner about the Magna Flow mufflers, i was going to do the same thing but he told me to go jap and jap only, so i got an Apexi N1, its not to bad but still quite loud...

i suggested a few 3inch twin muffler systems but i think the attraction from the EPA your getting is becasue of your race cat, i have one as well and the car is quite a bit louder because of it.

I bought a silencer for it on long drives and it shuts it right up and still goes well, but not as well as without it!! just be careful you dont lose any power over the different exaust and have a chat to Ben about it before you chose a different exhuast...

[benm]

I was just at a local exhaust shop speaking to him about my situation. Some interesting points he made:

- Their are 2 diff types of Magnaflow Cats, 1 has heaps of little 1mm holes and the other has 3mm holes. Provided you get the right size/volume cat it won't impact on flow only sound/noise.

- The rear canons (Jap) are nothing but a pretty hotdog which offer very minimal baffling.

- Their are 2 main types of baffling systems for the typical 'muffler (think; Lukey mufflers). The old style is where the flow pipe bends and twists around inside. The air/gases flow in a way to hit head-on with each other (effectively cancelling out on each other, hence reducing drone/noise but lots of back pressure).

The other type is basically a straight through pipe (enters 1 end of 1 side and exits the other end of the other size - sorta diagonal I spose) but has other parts inside the empty part of the muffler that do all the baffling. So basically the bigger the muffler you can fit under that rear bar the quieter it will be and better overall it will work.

[Ronin 09]

Benm - you should go to a truck exhaust shop and get them to put a v-band flange on your removable section, then it's a case of one bult, a band and you're done!

my trust TR has V-bands and it is easy to remove the rear section

[lwells]

The power getters arent supposed to be quiet, I think thats where the Fujitsubo Legalis R  comes in. I had a listen to a few of the sound files on the Fujitsubo site and you can definately tell the difference between the PowerGetter and other models.

<{POST_SNAPBACK}>

^^^ This is correct. Fujitsubo even include tested dB on their website. I can't find a listing for a Powergetter for an R34 GT-T, but here is the R33 GTS-t entry. For those that can't be bothered to click:

(Senario | Stock Exhaust | Powergetter)

Idling | 65 dB | 82 dB

Approach exhaust noise (4800 rpm) | 87 dB | 99 dB

3000rpm | 77 dB | 95 dB

5000rpm | 87 dB | 97 dB

4000rpm - 6000rpm response | 97 dB | 109 dB

The Super Legalis R is a much better choice (and considerably more expensive IIRC).