Stock Up-Pipe vs. Aftermarket??

livestrong14 · Post by **livestrong14** » Thu Mar 13, 2008 1:02 am

Hey guys,

Just wondering what your opinions were for the stock Legacy Turbo up-pipe vs an aftermarket stainless one?

Aren't ours almost exactly the same as a STi up-pipe? What benefits/ gains would you expect from an aftermarket one?

Thanks!

Damon · Post by **Damon** » Thu Mar 13, 2008 3:24 am

Probably nothing since ours are catless. You MIGHT get a little bit quicker spool if the aftermarket is smaller diameter but it probably wouldn't be worth the effort.

livestrong14 · Post by **livestrong14** » Thu Mar 13, 2008 3:33 am

Yeah, I was thinking the same thing. The free up-pipe I got is definetely larger in diameter, and has a flex joint which is kind of nice.

Anyone else?

BXSS · Post by **BXSS** » Thu Mar 13, 2008 1:19 pm

The STi & Legacy SS up-pipes look the same to me.

If the aftermarket U/P is bigger in diameter than the OEM one I'd think spool may slow down (less Exhaust gas velocity), but top end should be better (less backpressure).

Post by **Legacy777** » Thu Mar 13, 2008 2:38 pm

The STi & Legacy SS up-pipes are exactly identical.

It's been posted before, but I confirmed this when I bought an STi up-pipe from a local guy when my old SS up-pipe had a crack in the flex part.

livestrong14 · Post by **livestrong14** » Tue Mar 18, 2008 2:10 am

Anybody else feel like weighing in?

555BCTurbo · Post by **555BCTurbo** » Tue Mar 18, 2008 3:43 am

These guys are right on Devan...

The only real reason to replace the up-pipe is due to age and use...but if that is the case, just grab an STi one...

Small up-pipe diameter is good...it means you get a greater exhaust velocity to the turbo = faster spooling =

So I'd say sell that up-pipe to someone that likes shiny things and then take the $$ and get yourself some steering rack bushings and a nice dinner!

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Stock Up-Pipe vs. Aftermarket??

Stock Up-Pipe vs. Aftermarket??