Options and upgrades are listed below:

20'-21' Sled can have 72" or 78" ~ 22'-23' Sled can have 78" or 84" ~ 24' Sled normally has 84"
LSX, LSA, LT4, and Raptor 575 engines normally require a Hamilton 241 or Scott 912
A: (4) 8" Mids (1) 4 Ch Amp