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They make good paper wieghts....aside from that they will gain you no HP. Many report a "cool" whistling noise, whistling noises are not cool, they eqate to turbulance and you wont find any increase in cfm from turbuance and possible decreases!
I bought one, but its only going to kick in one I get a larger throttle body and Edelbrock manifold. Yep, waste of $, sve for a new throttle body. 2X the price, but 10X the power.
yea....i was reading 4wheel offroad....and they said the reg spacers are junk....but they said that the helix bore spacers are worth while...and they arnt just trying to sell an item because they dont sell
I had one of those spacers. It was complete crap. It gained nothing, and would create this awful whirling sound. Thank, but no thanks. Save your money. Learn from my mistake!