Stillen HFC's WILL give you a CEL unless they revised it and added the extenders. If not, you can just buy the L extenders off ebay for $15 for the pair. Thats what I ended up doing. The BEST thing about the Stillen HFC's is that it uses the same Header to Cat gasket as OEM. Its the OEM crush ring instead of the 3 bolt flange gaskets like every other aftermarket. It actually has a lip on the cat to header to seal it properly. Fitment was perfect though. CEL was the only problem which was easily resolved with the extenders.
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R.I.P. 8/01/13 1SlowZ
One day I'll have another....
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