Anyone ever heard of them?

 

I use to sell them. Everyone will tell you to go with Motordyne plenum spacer. Check the link.

http://www.b2autodesigns.com/index.p...sort=6a&page=3

 

So does this mean they are crap?

 

No they are not crap. I did sell them and install them. But after checking into Motordyne plenum spacers. I found them to be better quality spacer.

 

+1 i agree with charles motordyne is better

 

But lets be honest its a piece of metal or polymer that gets screwed in between your intakes. As long as it fits tight what else are you looking for? What is so much better about them?

 

quality control
perfect fit
all parts included
customer service

 

in addition to what is said the post before this, MD has done a lot of R&D work and makes both a 5/16" and 1/2" spacer. Each having its own area of power gain. The 1/2" making more power in the top end and the 5/16" making good power starting in the mid-range. Blox is a 5/8" and is believed to be too large to make usable power for every day driving, as it seems to only add power at the top end.