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Discussion Starter #1
just wondering if the stock exhaust manifold off of a d15b2 would be good for a homemade turbo kit on a d15b7... friend has one and i wanna swap him with my headers to go FI. i know alot of people use the HF's but i heard other ones work as well... anyone tried this? thanks
 

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it is crude but it will work just fine a guy is selling it on hmt
ugly shit... ebay and buy a cast log for 70 bucks or so
 

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Classic Man
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the HF wouldnt be better, if the elephant is done correctly. but if you weld some fucked up ass bends to your stock manifold its gonna suck. HF is also internal wastegated, and should stay that way. the elephant you could make external.

but the HF does have advantages...

shorter runners = higher energy gas pulses into the turbo
stronger design (over an elephant top mount) = no turbos rolling down the road.
better heat retention = more energy into the turbo
 

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I have seen these cut and a turbo flange welded on, that design flows better than the HF type, however the weld cracked a couple of times. For good daily driver reliability the HF mani or aftermarket cast mani is the way to go. My last turbo'd Civic ended up going to a co-worker of mine with a HF manifold ,ball bearing T25 skyline turbo on it and it's till going strong after 2 years and approaching 180k on the original Y7.
 
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