32 Gtr Exhaust Help

[anon32]

Yes I have searched but haven't found the answer.

I read in a current thread that exhaust sizing for 350kw should be 3.5" and 400+ 4"

Now being I am aiming for over 300 and close to 400kw I assume I should run a 4".

I cant find one so assume Ill need to get one made, no issue there.

My question is with the theory that exhaust should be bigger where its hotter ie: dumps and front pipe. Are the tomei expreme large enough?

I have seen cars with over 400 running them but are they actually restricting those cars?

and would the Midori Seibi front pipe mount up to them? or should I run a custom say twin 3" with 4" cats into a 4" the rest of the way?

[jangles]

Anything will work, some will work better than others. Like said in the other recently started exhaust thread.

You need to know the sizes of the components you want to use.
What turbo's are you using?

[GTR_JOEY]

Use 3 inch dumps with similar sized front pipes.

Then into a large cat, at least 3.5" then 3.5 after the cat is fine

Don't need a full dual 3 inch.. Not required

[anon32]

ok cheers, and will be GTX2863 turbos in -5 housing.

so are the Tomei Expreme dumps 3"? cant seem to find the dimension :S

[Piggaz]

No. They're 68mm iirc.

Tomei series 1's and Midori are 72 mm. There is a brand that is 3 inch but I can't remember right now.

[jangles]

No. They're 68mm iirc.

Tomei series 1's and Midori are 72 mm. There is a brand that is 3 inch but I can't remember right now.

HPI

[JH32]

No. They're 68mm iirc.

Tomei series 1's and Midori are 72 mm. There is a brand that is 3 inch but I can't remember right now.

Pretty sure HPI are 3"

edit: snap jangles

[anon32]

So why do I see so many people using and loving tomei expremes?

Are the HPI no good as far as quality?

[GTR_JOEY]

People tend to love what they have lol

Not saying there's anything wrong with the tomei's, there's just bigger ones that flow a bit better with larger turbos

[anon32]

ok cheers

[Piggaz]

HPI

Deeeeeerrrrr. That's the ones!

Buy these and have a decent set of front pipes made.

Done!

[anon32]

ok awsome

[Blackkers]

HPI dumps are 3" belmouth. don't go for split dump pipes!.

http://justjap.com/hpi-stainless-turbine-outlet-set-nissan-skyline-gtr.html

or RHDjapan.com has them cheaper

[r32-25t]

The new midori ones are also 3in