I want to rebuild my hsw solenoids but dont know what kit to buy.I have the HSW Sudden Impact 78MM EFI Wet Plate N2O KIT. I really just need the nitrous piston

 

You may be better off buying new ones from a company still in business. Since HSW isn't in business anymore, you can't send them off to them to be re-built.

 

Tried to edit message and it completely messed it up leaving out txt etc....



It's really hard to say because the internal pistons vary from manufacturer to manufacturer in most occurrences. Your best bet would be to send it in and see if the company you sent it too has a replacement. Not HSW because they are out of business.


-Chris