Na R34 Coupe

[JNzz]

Hi,

I recently got my R34 25GT Coupe and want to change the exhaust so I can make it louder but not too loud so it sounds off putting.

I'm a P Plater in Victoria, I hear I can only change the rear piping after the cat for it to be legal.

I'm not too sure what to look for exactly, been looking around for days with little luck, so can someone please point me in the right direction?

Thanks,

Jesse

[Burger]

Hi, and welcome to SAU, the best place in the world for all things Skyline.

According to the Victorian "P" Plate laws, any vehicle (Even Mum's Camry) can be considered prohibited if it: "has an engine that has been modified to increase the vehicle's performance (other than a modification made by the manufacturer in the course of the manufacture of the vehicle"

This means that exhaust mods are basically off the table for P Platers, as even a cat back, like you mentioned could theoretically give performance gains. Still, many do it anyway. (A cat-back on an N/A would give very small, even possibly non-existent gains)

If you still want to do this, try to be a bit stealthy about it. (An R34 with P Plates on it is already a cop magnet, regardless of modification level)

I personally suggest ringing up or emailing your local exhaust shop, and getting a quote for something made up and installed, as most popular brand made bolt on systems systems are for the GTT (Turbocharged) model.

Completely avoid the cannon, and try to stick to the stock twin tip look, to avoid attention from anyone unwanted.

Maybe look into getting an X-Force Varex muffler, which allows the volume to be controlled if you want to keep quiet if need be, to avoid unwanted attention.

The RB25 sound can actually be quite nice, if done properly.

Good luck with your R34.

Edited November 22, 2015 by Burger

[JNzz]

Thanks Burger, I'll have a look.

To get a good sound, do you reckon I should look out for a muffler with a 2.5" inlet and a 3" outlet?

I found a single tip and double tip that look alright but not entirely sure what I should look for when referring to sizing.

[Burger]

That should do the job. Just avoid the cannon.

[JNzz]

Sounds good, just to make sure, an vmk7-250 with a 2.5" inlet will weld straight onto the stock piping?

[carloschen]

[Burger]

Sounds good, just to make sure, an vmk7-250 with a 2.5" inlet will weld straight onto the stock piping?

If it doesn't, the exhaust place will make it fit. It's part of their job.

[JNzz]

What exactly is above the muffler? Just wondering because the muffler has the alternating accessory on top of it which controls the volume. Is this a hassle or not?

[Burger]

It's the motor that is connected to the butterfly valve, that opens and closes it, which restricts flow and noise.

[WMDC35]

I would leave the exhaust std on the NAs, it doesn't really make them go better & they can get a bit twangy

[Hadouken]

Drill hole in exhaust. It will sound same

[Burger]

I would leave the exhaust std on the NAs, it doesn't really make them go better & they can get a bit twangy

This is true, and you aren't even allowed engine mods on your P's anyway.

[Burger]

Drill hole in exhaust. It will sound same

Would sound fully hectic

[JNzz]

Only 1.5 years until full license, then more mods coming my way

[Burger]

You won't get too far modding an N/A. If I only had a year and a half left, I would have bought a $1000 VT for the time being, and then bought a GTT.

[SS-]

you could get a Cat back with a added mid muffler and a high quality end muffler. i like magnaflow ones but everyone is different. would stick with 2.5" don't expect any gains tho.

[Burger]

Any updates JNzz?

[JNzz]

Yes yes sorry haha been quite busy lately. I ended up getting the vmk7-250 varex muffler

[statue]

Awesome. How much all up - $550? It's the first mod I did on my N/A back in the day. Very handy passing cops, going through RBT's, driving inlaws, being taxi boyfriend, talking, etc.

With mine, adding a pod makes a difference to the exhaust sound. better inhale = better exhale. or maybe a high flow filter will work on your airbox. I never tried it though.

Both is illegal here in NSW too. I got away with it for 3 years and I got defected for Pod filter. They said nothing about the exhaust. Now using the airbox since that day and my GF driving it now.

Just don't spend anything else until you get turbo skyline, you'll need the money, trust me! been there done that!

Goood luck

[JNzz]

Yeah it was around 700 really, paid a bit extra to get it done properly considering I went to a few places that said they couldn't do the job.

I'd love the turbo but I'm not sure if I'd be able to make the extra money for when I get off my p plates.

Would love a garage too, less likely to be keyed!