Guys,
I don't deny the fact that Powerzone's extractor is giving good hp and judging the price they better be good, but based on my 2 cents, i think just go for any cap ayam brand is good enough already, some more they are using white pipe now, I used to use Hotbits headers for my G2, their 4-2-1, thankfully i got it from a friend of mine in Paramount garden for RM250, rather than getting it from speedworks RM340, i will say that, i dont know what hotbits people are doing because their flow is not balanced and its not right, as you can tell from this picture
http://i23.photobucket.com/albums/b359/ethanphoon/050917021418.jpg
Just look at the flow, firing order is 1-3-4-2, pipes 1 and 4 goes to 1 pipe and 3 and 2 goes to 1 pipe, so when the pistons are firing in sequence, you'll get a boxer sound effect when idling, no doubt this gives you a very nice sound effect but the power is not very good as compared to my friends cap ayam 4-2-1 with normal correct flow
http://i23.photobucket.com/albums/b359/ethanphoon/RallyAtSepang009.jpg
I saw Waja's hotbit extractor and it looks really good, but i'm not sure whether the gasket hole is the same or not.