Parts for 3 gear laydown on DT kit chassis:
Z2-018 - Graphite rear shock tower
Z2-018M - Bulk head mount/G box support/R upper arm mount/Shock tower spacer
Z2-118P - Graphite battery plate for YZ-2
Z2-302C3 - 3 Gearbox set for CA (Carpet and Astroturf)

Optional:
Z2-017 - Graphite front shock tower (Flat type)
Z2-017G - Graphite front shock tower (Gull type)

Nice:
MDR10017 - Mckune Design YZ-2 Locking Battery Brace

Source:

N. Lewis