This TGK Motorsport Air Tank Upgrade is a drop in replacement for the smaller OEM air tank. When using something like the TGK Dumpbox, the factory air tank is not large enough to raise the car efficiently. Upgrading to this 3 Gallon tank ensures that you have enough air capacity to raise the car from dumped to ride height without stressing your factory compressor. You can also use this tank with aftermarket suspension systems for an OEM-style appearance and an easy tank install.