comparing 3 knid of header i think dc and AlphaWerks is better than megan racing.
beacuse the air flow come out the exchust pipe and the megan has a pre cat. all of these header throw a cel.

more flow the better in high end

ok...thanks

Just to clarify...the ALPHAWERKS HEADERS DO NOT THROW THE CEL!!!

We have developed a "smart" O2 simulator to eliminate all check engine light problems on the car forever. A cat made in China will only last so long on the car before the CEL is thrown and then you are back at square one and you are also making less hp because the design still has to go through the cat.

Plus the Alphawerks header comes with the OEM mounting bracket. The DC Header does not come with this stock bracket. This affects the life of the header because without this bracket the welds on the exhaust manifold flange will crack because the tc motor mounts are very soft and the engine movement without the bracket will cause these problems.

Best regards,

Victor D.
Nexus Industry

The Alpha Werks header is in stock and available at http://www.racingsolution.com/products/Scion/TC/1166/SciontC4-1StainlessSteelHeader