That's the dyno from my car btw.

Here are my impressions of the header:

The headers are amazing in terms of build quality (the welds are a work of art) and the power gain is very noticeable. It improves throttle response down low and the car pulls all the way to redline with no dip in power. The engine also revs freer and faster. The car also seems to start up easier than before for some reason (better airflow?). The engine sound after 3000rpm is also a lot more aggressive than stock and you can feel a kick at around 6000rpm (something I didn't feel before).

Weight: Approx 50% lighter than stock.

The downside is that there's a hisssssing noise even with very light throttle. I'll have it checked soon for leaks but I think it's a property of the headers. The hissing sound (sounds like i have a nitrous system) can be a bit distracting/annoying imo - esp in start stop traffic. I wonder if there's a way to mute the hissing sounds.

Last but not least, Adrian from Toda's a very nice guy and they did a great job installing the headers. Thanks mate!

For those who are curious, the Mugen intake (got it second hand recently) is very similar to the Comptech icebox but with a bit more power (butt dyno), better response and better intake sound.

Here's some pics of the install:

Headers and High Flow Cat (The cat is welded to the Toda test pipe):



Flex joint close up:



Installed headers (2nd sensor had to be extended for it to fit):