Dump Pipes On R32 Gtr

[SiR_RB]

if you have just a 3" cat back on an r32 gtr, how much of gain would you get with aftermarket front pipes and a high flow cat ? leaving the dump pipes stock?

[R31Nismoid]

A reasonable gain... depending on the turbos.

Factory probably not a lot.

Aftermarket, im making 280rwkw on just over 1 bar with factory GTR dumps and frontpipe/exhaust (GT-SS). Not R34 dumps, R33/32

[geetea-are]

The Tomei website lists the BNR32/33 stock dump pipes as 58mm, and BNR34 as 55mm: http://www.tomeiusa.com/recentmail.asp?mid=106

Confuses the subject alittle, as I assumed the stock R32 dump pipes were 50mm because that's what the stock front pipes inlet's (internal diameter) i measured were.

Is this true? I was looking to get some r34s ??

[SiR_RB]

I had r34 Gtr dumps on my old Gtr and pretty sure I measured the outlet size to be 60mm

[geetea-are]

Awesome cheers