Tomei Expreme Outlet pipe. Anybody used them? What down pipe to use?

[Stagea_Neo]

Hi All,

After any suggestions or advice on how to proceed here, whether it be off the shelf parts or custom.

Been looking at different exhaust options. Definitely don't want one of those off the shelf cat back systems as still be using stock turbo outlet and down pipe.

In addition to that, the bell mouth dump pipes concern me in regard to the internal welding and wastegate valve/flap fouling on each other. 

I read a thread in here somewhere the other night about that occurring.

 

So moving forward I plan to go the tomei expreme turbo outlet pipe which has the 76.3mm / 3inch outlet.

However i'm finding it hard to locate a down pipe that goes to the cat which is the same diameter all the way through.

The down pipes I found seem to all be 60mm/2.3inch (stock size) from the turbo outlet and step up to the bigger diameter at the cat end even quoting 80mm.  ie. jjr, blitz,apexi.

I just want to match everything to the same diameter.

 

Beyond that from the cat to the muffler is pretty easy to get sorted at an exhaust shop.

I plan to finish of with a magnaflow 3inch inlet, dual 3inch outlet and maintain stockish look.

Cheers,

Pete

 

Edited September 8, 2022 by Stagea_Neo

[GTSBoy]

Just get a cheapy full length dump from JustJap or similar. You're not going to make an extra million HP either way. They are seriously fine.

[Stagea_Neo]

Cheers.

Yeah I was a little worried about this situation as posted by zoom zoom on page 3 of the thread.

 

[GTSBoy]

So.....what turbo are you bolting it onto? Stock? Then there will be no cause for concern. The problem reported by zoomzoom is only on a significantly larger turbo with a much bigger wastegate flap. The chances of you finding yourself in this position are slim. 90+% of all turbo upgrade options you might pursue will require a different dump pipe anyway. Furthermore, should you find yourself in that position, it is not exactly rocket science to do mods to a dump pipe. Any half decent workshop would be able to cut and shut as required.

[Stagea_Neo]

Thanks for elaborating.

It's the stock turbo, for the future I was eyeing off the hypergear high flow service. 

SS2 profile for the rb25neo advises 'Price includes an a larger 38mm billet internal waste gate fitted'.

That's where my concern comes from.