What kit you choose depends on the values in your amp. In V4's, there are a pair of filter caps that had different values. I forget which two exactly, off the top of my head.
Realistically, either would kit should work, but most people go with the fliptop kits for an easy and direct replacement.
The big differences would be getting two 100x40 caps (version 2 on fliptops) or one 70x40 and one 70x40x40 (version 1).
Take a look at the two cans in the middle of the chassis and decide from there. Also consider skipping using the mediocre and pricey cans used in those kits and look at your options for using high-quality mod caps, for less money.
Realistically, either would kit should work, but most people go with the fliptop kits for an easy and direct replacement.
The big differences would be getting two 100x40 caps (version 2 on fliptops) or one 70x40 and one 70x40x40 (version 1).
Take a look at the two cans in the middle of the chassis and decide from there. Also consider skipping using the mediocre and pricey cans used in those kits and look at your options for using high-quality mod caps, for less money.