Twin 3 Inch Exhaust !? Anyone Done It?

[cobrAA]

I'm thinking about custom exhaust.

Actual setup: R34 dump pipe ( 58mm), RS*R downpipe (2x70mm to 85mm), ultra quiet resonator (76mm), 76mm straight muffler and finally a varex 76mm exhaust.

I plan to go with : Tomei 76mm dump pipe, custom downpipe 2x 76mm extra long with a 76mm resonator welded then it would merge into a 100mm muffler and finally another muffler at the end.

However, do you think its possible to fit this under the R32 GTR? Anyone have done it before?

[Frosty]

yeah i recall will (japtaxi) running them something similar on his car back in the day! i dont know if he is still around....

i think i have pics somewhere and will check for you on weekend sometime

[Piggaz]

I have a twin 3 inch on my car, however it's a 33 GTR. It does get a bit tight in places thats for sure.

[Shoota_77]

I've got twin 3 inch for the purposes of a 30/26 but haven't run it yet.

Piggaz have you got any piccies of yours? Do you run cats then just one set of muffs per pipe or resonators as well?

[R31Nismoid]

Piggaz has a Racepace. So dual CATS, 2 Mufflers on each pipe... And as he said, it is very very tight in some places as a result.

And hence I'm gonna say - Twin 3" just weighs & costs FAR too much for what you get out of it. Easier to just go with a single 4" which is good for 400rwkw+ anyway. Is lighter, cheaper and you can get two massive mufflers for the same noise reduction. (looking at a GB of 4" exhausts in a few months )

If you are dead set on doing it you don't need the two resonators as you come off the front pipes. Two _asbigasyoucan_ mufflers on each pipe will be very adequate. It would be a SUPER tight fit on a R32 that's for sure.

[Piggaz]

No cats here Ash. Not even a "straight pipe(s)".

As Ash said. It weighs a farken heap.

[Frosty]

No cats here Ash. Not even a "straight pipe(s)".

As Ash said. It weighs a farken heap.

titanium time

[jangles]

Tomei make 76mm dump pipes?

[Piggaz]

Tomei make 76mm dump pipes?

No. If they're the Tomei Series 1's, they're 72 mm internally.

Tomei Series 1 pipes look like this.

The Series 2's which look casted are 68 mm internally.

[KING87]

Midori make a 76mm one.

[Piggaz]

Midori make a 76mm one.

Bought a set. They're the same size as the S 1 Tomei's. Got photos around here somewhere.

[KING87]

Ah ok so 76mm OD. I bought some the other day just waiting for them to turn up.

Are there many gains to be had with porting the stock manifolds?

[cobrAA]

thanks guys for the input! didn't know they were 72mm.

why I wanted to run twin 3 inch was in order to fit the 3'inch ultra-quiet resonator ( they do a great job, I have one right now) and then it could merge into a 4inch exhaust.

I still need to fin a dump pipe bigger than the r34 oem right now.

[Piggaz]

I still need to fin a dump pipe bigger than the r34 oem right now.

Pretty sure the HPI dumps are 76.3 mm internal diameter. What Turbos are you running?

[jangles]

Pretty sure the HPI dumps are 76.3 mm internal diameter. What Turbos are you running?

They are, have a set on mine.

[cobrAA]

-5s

[luke gtr]

Bought a set. They're the same size as the S 1 Tomei's. Got photos around here somewhere.

had midori, 3inches internal.

[Nee-san]

Piggaz has a Racepace. So dual CATS, 2 Mufflers on each pipe... And as he said, it is very very tight in some places as a result.

And hence I'm gonna say - Twin 3" just weighs & costs FAR too much for what you get out of it. Easier to just go with a single 4" which is good for 400rwkw+ anyway. Is lighter, cheaper and you can get two massive mufflers for the same noise reduction. (looking at a GB of 4" exhausts in a few months )

If you are dead set on doing it you don't need the two resonators as you come off the front pipes. Two _asbigasyoucan_ mufflers on each pipe will be very adequate. It would be a SUPER tight fit on a R32 that's for sure.

Keen for group buy Big boy !

[topher_]

I'm getting it done on friday, i'll get some pics taken for you if you want?

[fatz]

I did a twin 2.5 inch on a rb26 in a 31

No mufflers

Sounded like a v-twin Harley f**king light plane on takeoff

Put mufflers on it or it will sound shit( ones that mix the exhaust)