nc89sho
S13 Sellout
i really did not like the collector on this y pipe. this is what i'm talking about.

i messured the inner diameter and the ID of the two primary pipes was right at 2" the ID of the Collector was also 2" from a flow standpoint this is a no no.
So i fabbed up an improvement.

Now it's dual 2.25" OD to Single 2.5" od, wich matches the cat back. sound a little diff. too. but i think a big improvement.
No on to removing some more weight...
that's right. i said it.

i messured the inner diameter and the ID of the two primary pipes was right at 2" the ID of the Collector was also 2" from a flow standpoint this is a no no.
So i fabbed up an improvement.

Now it's dual 2.25" OD to Single 2.5" od, wich matches the cat back. sound a little diff. too. but i think a big improvement.
No on to removing some more weight...
that's right. i said it.