??? when the good the bads pls explain beter my setup GT35R b16 84mm thanks

 

good: a lot more flow.

but with a GT35R, I'm gonna say it's not necessary for you.

bad: friggin huge. Space is an issue for sure. Piping is expensive and mufflers are expensive. loud!

 

why no a GT35R

 

I have a 84.5mm B16, GT35R, Open 4 inch downpipe. Not that loud until you get on it, has a nice deep rumble cruising and at idle. Fitment was an issue, took some time to mock up and then get tig welded together. It gave me a noticeable better spool time over my 3 inch downpipe. My car used to fall out of boost for a split second with the three inch, with the 4 inch it spools right back up between shifts

 

I think youre mistaking loud for spool.

 

more info pls

 

Bump

 

You dont need it. Made over 630 on a 35R. on 3 "...

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+1