Beware of cheap aftermarket headers. All they will do for you is lose a couple pounds and add a few decibels. Stock manifold is relatively efficient as is, just heavy. I replaced my stock manifold with a very nice (and very pricey!!!) GReddy header, and only noticed a slight power increase in high RPMs. However, it came with there "signature" Jet blue coating, which I noticed drastically reduces engine bay temp. If your not concerned with making more power, I would say ceramic coating the stock manifold is an awesome idea! The more heat you keep out of the engine bay the better. If you DO want more power I would suggest going with a quality header, such as a TRD piece. FWD corolla headers work as well, which are available from many reputable companies. Check out
MR2 Owners Club Message Board™ out, there are usually good used headers selling on there all the time!
If you want real performance, cheazy eBay headers are not the way to go!
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