Downpipe question?

[dsmgabe]

does anyone know if the punishment racing downpipe for a 2g gst is a full 3" or the same as the megan with the 2.5" inlet ?

[bmoha7321]

The one I got 3 years ago is A smooshed 3". Meaning it has indents on each side into the diameter of the 3" pipe where the flange is slotted to fit up to different O2 sensor housings.

[dsmgabe]

is the piping 3" all the way or is it like the megan that is only 2.5" untill after
flex pipe.

[DSMsOwnYourV8]

I just got one for my GSX and it's 3" all the way. I think the GSTs are the same.

[bmoha7321]

It's 3" that's pinched.

So I wouldn't call it true 3". I'd wonder if 2.5" like the Megan wouldn't flow better and smoother

[dsmgabe]

What do you guys think of the Megan downpipe? And what's a good low cost o2 housing?

[Tim_I]

i know two people running the ebay O2 housing but they both had to have some of the welds rewelded after they cracked. Seems like thats the only flaw in them. The megan downpipe seems like a decent downpipe to me. have one to put on my car and my buddys running one on his laser.

[dexterholland04]

The easiest way would be to call Punishment Racing and ask...

[91stocker]

What do you need a "true" 3" inlet for anyway? Most MHI turbos have a 2.5" outlet. As does the o2 housings. I guess you can port the evo 3 o2 housing outlet to almost 3" but the dowpipes dont line up right.

[dsmgabe]

Originally Posted by Tim_I

+1 lol

I sent them an email but there has been no response.

[bmoha7321]

I think the "3" of the Punishment was a pita. I'd go with the Megan.