Thing is, ive been reading alot about the tb spacer, and it made like a 4.5kw gain on the Si. Not sure about the fd1, but people saying that it feels better and sounds different too. Apparently, the Throttle body spacer, allows more air flow, much like your DIY, so i was assuming that if i combined that 2 then i would get a better result xD
Originally Posted by ekay1
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