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Just noticed that i have 2 broken exhaust manifold studs. While i have the manifold off i was looking at getting it ported for better flow rather than getting a cheap stainless manifold.

would this be of any gains or a waiste of my time.

mods so far

splitfire coils

fmic

ebc

hyflowed turbo

bosch intank pump

turbo back exhaust

haltech ecu

any thoughts would be of help

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The stock manifold is good for 300kw apparently, one thing you should do is get it faced, cause it will most likely be warped.

Also you could ceramic coat it i like did, might make a difference i hope.

another thing, replace all of the bolts, even the non broken ones with high quality bolts, no cheap stuff

Edited by SliverS2

get a die grinder, and take off any hard edges, curves, or castings.

I did it with mine. Apparently, when sending your manifold away for flowing, 80% of the flow is achieved with the die grinder, and the other 20% is achieved with extrusion honing.

You can get similar flow to a Low mount HKS cast manifold if you and grind good and do it properly.

Oh, and definitely get it faced.

Edited by The Mafia

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