I think I'm the only person that runs one of these plenums. It was a noticeable difference from stock, especially in the low end, even with the stock t/b(I had my camshafts installed by this point so that matters too). I used a drill with a stone drill bit and I cleaned out the inner casting slag and made it smooth. One downside is that you will probably need to seal the upper lid so it doesn't leak air. I used a thin layer of silicone gasket maker. This works well if you don't trust the tiny couple of screws they give you.
IMO it looks ugly in the pic but I think it looks cool and unique installed.
Here's to the people that don't care about anything but going faster
Now I've got to learn how to adjust it for upper rpms, as I never knew until looking at the link.
What exactly is one to adjust? It would be nice if they had installation instructions on their site for it.
I take it many on here have had a bad experience with GMS?
I dont care if it looks good at all, Im not going for prettiest engine.
But does it flow well?
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