The SFI ratings refer to the fire protection level that the suit offers. Different types of racing will require different levels of such protection depending on the potential exposures. In particular, will require a . (aka an ). Here are all of the SFI-5 suits we offer sorted from lowest priced:
If he is looking for a 1 Piece suit the is a great starting point.
Limited Modified also requires SFI 3.3 Shoes and Gloves (This is equivalent to SFI-5 on these as well)
As for a Helmet, he will need an .
I've pulled all of these requirements from the Limited Pro/Modified Rules section 15.9. Here is a copy of them:
If he's just starting out and doesn't have any of this gear yet, I would take look at picking it all up together in an .
This will be cheaper than purchasing all of these items separately.
I hope this helps! Let me know if you have any other questions!