yeah i can see that but i feel its best to learn the hard way.

I've had a fair few cheapo things off ebay for my civic and was as good as the branded things.
The air filter i bought made it come up with 138 on the rollers. not too bad seeing as it only came with 130 out of the factory a million years ago.
Same with the short shift and strut brace too.
the only thing i'm worried about is joining the two together. i reckon both will fit fine individually but not sure about the both lining up.
Think its gonna be a case of cross my fingers and see.