top mount manifold

[JaredP]

hey guys,

i'm getting a larger turbo for my rb and i cant seem to find many options for top mount exhaust manifolds. the only ones i can find are 800+ or ebay special. is there anything in the middle ground? t3 flange with external wastegate...

[gtrjon]

lol im in the same boat buddy. the ebays are garbage and anything else new is around 1000 bucks. i thought of trying to find a used greddy/hks for around 700 but i decided its not really worth it. instead i decided to go 6boost and if i get 2 more guys who are down it will hopefully be under 1000 bucks for the best manifold that you can buy imho

[JaredP]

ya i've seen the 6boost ones and they are really sick. id be down depending on pricing. either that or go ebay and weld supports to the runners

[Skym]

It's the exhaust swinging left to right that causes any exhaust manifold to crack or break exhaust studs. Exhaust alone can be from 4kg (titanium on racecars) up to 20-23kg (mild steel, stainless steel, depending on mufflers that are used) and that's swinging left to right on engine when cornering. Just put a flexi on front pipe (like they do on some GTR front pipes) to reduce / eliminate the swinging.

Also Sinco Customs in NZ make exhaust manifolds, guaranteed for 10 years -

http://www.sincocustoms.co.nz/products/Nissan%20RB20-25-30%20Top%20Mount/16

I read that the Sinco exhaust manifolds retail for around $1200NZD or around $917 CAD. They seem to be popular on EVO's downunder.

[JaredP]

i didnt know it was mainly from the exhaust swinging. i've heard it had to do with weight of the turbo/exhaust system, but swinging would make sense. thanks skym

[Skym]

I don't think exhaust manifold + turbo is heavy enough to break welds. Honda's use a flexi in exhaust to help stop upgraded exhaust manifold from cracking.

[killapotatoe]

Have you guys heard of sinco manifolds made in NZ from Sinco Customs? Check this link out http://www.turbomanifolds.co.nz/

DSRTurbo