I also followed that link and thought, 'Cool, bolt on 20hp for only $300!', but then I looked at the instructions.
They say that you can't reuse the two gaskets. those two gaskets are proprietary to the spacer. So my problem with this is,
after you install this, and you want to get back in there for any reason, where do you get the replacement gaskets?
Also, I found it hard to actually buy one online. I'm guessing that most people replace the intake rather than a spacer? IDK.
Tiger Eye's has one according to his sig, How about it Tigereyes, can you tell us about it?
---------- Post added at 08:06 AM ---------- Previous post was at 08:05 AM ----------
Supposedly the baseline run was dead stock, then the spacer was added AND the PCM was tuned at the same time.
So how much the spacer added vs just the tune hasn't been verified
I think that I just read the same thing on FSC, from 2005? Guy did the spacer and a pcm tune at the same time. Loves the mods, but can't tell which did which for him...
I think that the vendor's webpage was a 96 pickup, with just the spacer added though. Those charts are pretty impressive.