Excellent quality Graphite chassis for the Sakura D3. Improves rigidity and perforance overall. It's worth pairing up with the Graphite Front (SAK-D307/SG) and Rear (SAK-D308/SG) shock towers. To finish off, get the Graphite Upper Deck (SAK-D332/SG).
Alternatively, get the Graphite conversdion Kit with all 4 parts together (CB0657).
For either choice, once you have the Graphite chassis, you will need the Transverse Battery Mounting Kit upgrade (SAK-D320/SG and possibly SAK-D306/SG for small batteries).
Consider upgrading other STD plastic parts to aluminium, as the graphite chassis is quite strong.