These things actully work? Are they more of a restriction than a booster? Are they worth buying?

 

If your dirt poor and struggling to put food on the table dont bye it ... On the other hand If you have a need to make power even if it is a just a few horses at a time with just a few dollars at a time then get it YOU HAVE TO START SOME WHERE ....

Remember to be realistic in your expectations 5 or 10 horse power at 5000 rpms isnt something that you will feel.

 

Spend you money on something better there junk if you close to running stock.

 

I got mine for 5 bucks when I picked up my 4th gen alum driveshaft, didn't feel a thing but they had a bunch there so I said throw it in