Quote Originally Posted by SpikeED3 View Post

Where the headers meet the block looks interesting. There seems to be a little more weld blocking the air flow from cylinders number 2 and 3. Even though this is a minor issue, cylinders 1 and 4 clearly don't have the same problem. So why aren't they all the same?




If you look in the left pipe you can see the small lump of slag still left behind. Is it a big deal? Not really. But it may reveals a little something about the level of quality control.
I have a set of OEM dc2r headers at home (aus spec). I was surprised how badly they were welded together when I looked closely at the ports.

2 of them look pretty much like your Megan racing ones with a big lip and weld bead on the bottom edge but the other 2 are a fair bit smoother. The merge at the collector was a lot better though very small diameter.

Seems it's not only after market with shit QC.