HELP. stock ka24de exhaust manifold

[nightrider32]

Hey guys, i just did a dohc swap in my 89 coupe. There is a long alloy looking pipe coming from the pipe just below the exhaust manifold. What is this for and do i need it?! Thanks!

[Homer_Simpson]

Sounds like EGR.

[nightrider32]

thank you!

[projectRDM]

Or AIV. There's two pipes on a DOHC manifold.

[DJ PoW]

you don't need the pipe, its probably EGR but make sure if you cut it off/take it off you plug it up or you will have an exhaust leak that will annoy the shit out of you.