Is it safe to put the ls1 Fast Fuel rails on my stock ls1? will i need to do anything else with the install? also will i see any kind of improvement? not sure if ill see mad gains of HP of any sort, but just an overall good performance? Thanks! ^^

 

You'll never see a "gain" from a fuel upgrade, unless its giving you power that was left on the table before because your fuel system wasn't up to par. A fuel up grade will allow you to make more power, but you will have to add more air to go with the added fuel.

This will help you:

https://ls1tech.com/forums/new-ls1-o...anna-fast.html