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Hello,

at the moment im running a split dump pipe to a seperate front pipe then high flow cat then ces catback.

Have been looking around at options to replace just the split dump to a bellmouth 3".

reason being is car is being tuned shortly and the split dump is only 2.5" so could cause a slight restriction.

I'm finding it hard to come across bellmouth style dump pipes that dont have a front pipe attached.

http://www.justjap.com/store/product.php?p...at=0&page=5

^ i found this but its heaps pricey. can anyone point me to someone who sells something similar?

is it really worth it going from 2.5" split to 3" bellmouth?

Cheers

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https://www.sau.com.au/forums/topic/297530-r34-gtt-dump-pipe-options/
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Hey have you seen this one?

http://www.justjap.com/store/product.php?p...at=0&page=1

Im not too sure if it would cause a restriction but it makes sense that the 3" would give you more flow because it is bigger pipping.

yeah saw that.

thats what im trying to avoid though. as i already have 3" front pipe.

id like to keep dump and front pipes separate if i can. as i will most likely upgrade my standard turbo later on. i wont have to change everything again.

so im just looking for dump pipe section only.

  • 2 weeks later...

bringing this topic back up

Found someone who's going to make me a dump pipe only.

he's suggested 3.5"

for standard turbo (r34 highflow soonish) is it worth the 3.5" or would that make it worse? pressure issues or something?

rest of the system is 3"

price is negligible between the 3" and the 3.5" options?

couldnt find many people at all using a 3.5" dump so thought i'd ask

i bought a stock r34 dump off here, took it to a guy who does exhausts (mainly for chasers) and hes getting flanges laser cut and custom making me a 3.5" dump all for under $300

should work a treat

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