Hi

Need some help deciding on upgrading exhaust on my turbo S.(430-450whp)

Currently own a Greddy spectrum elite dual, which is 70mm piping to 63mm dual piping and mufflers. Love the looks of this exhaust, but I feel its time to upgrade to a better diameter suited more for turbo.

I looked at current offerings but all are single styles which I dont like much (hks,greddy,berk etc.) And at the moment im not considering have a custom 3inch dual made.

So the question would be if a dual full 70mm would flow better and/or net better/same numbers than a 3" single.

Thanks!

 

If you take the center bore size of 3" from say downpipe to the Y section of the exhaust (where it splits into dual), then for the dual pi R squared dictates to get same flow from the duals you need 2.5" which actually puts it over 3".

Personally i'd go with custom 76mm bore to two 63.5mm, add a small centre backbox and two backboxes.

Hardly any drone with the power to get good power.

 

I would also recommend going custom you can have them set it up any way you like.

 

My custom 3", custom is the only way to go.

 

Nice. The welds looks very good.

Did you went 3" including Y ? Did you include a resonator? Is it to loud?

 

Yeah pipe from down pipe to both mufflers including Y is all 3" and no resonator. It's obviously louder then stock but not by much and at idle one would never know what's going on underneath. Couple other views.

 

Yeah pipe from down pipe to both mufflers including Y is all 3" and no resonator. It's obviously louder then stock but not by much and at idle one would never know what's going on underneath. Couple other views.



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Looks great!! Great custom job! Looks like stock

What muffler did you went with?

 

^ Went with MagnaFlow offset/center mufflers and OEM ap2 tips.