Dump Pipe Question

[blitza]

Hi All,

I'm after a bit of guidance. I have a 3" cat back exhaust and want to get the remainder of the exhaust system upgraded.(the dump pipe) I have found two different styles, both say they are direct bolt up. I'm still running stock turbo on my R34 GTT coupe. One style is a 'bellmouth' where the wastegate is included in the pipe and goes all the way down. The second is with the wastegate pipe being separate from the turbo pipe and rejoining the dump pipe further down. Take a look at the pics and if you could advise which one would be better and what the differences in the two would be. I have found that the bellmouth tends to be cheaper than the other style.

Cheers,

Steve

[Strik3r]

pretty much 0 difference for stock turbo. And if you upgrade the turbo you'll need a new dump anyway so if you can get the bellmouth cheaper then go for it ^_^

[Toasty]

i would say the one on the left simply because the other pipe is restrictive for the exhaust gasses.

[mad082]

well i think it was 666dan found that the bellmouth dump pipe solved his boost spiking issue.

[Nismo_God]

i always thought the split dump was better....thats what i got and no problems.....

[666DAN]

It helped, boost tailed off less with the bellmouth...but still happened.

LOL that bellmouth you've got a pic of is actually on my car right now...may swap back to the CES split though if there aren't any takers, also throw the stock turbo back on and see how I go :S

[sky_2.0T]

  666DAN said:

It helped, boost tailed off less with the bellmouth...but still happened.

LOL that bellmouth you've got a pic of is actually on my car right now...may swap back to the CES split though if there aren't any takers, also throw the stock turbo back on and see how I go :S

HKS makes a really divorced dump pipe. I like it alot