Pablo Sandoval's sick car collection just got $200,000 sicker ... 'cause the S.F. Giants super star just tricked out his brand new Range Rover ... and TMZ Sports has the footage.
Sandoval took his '14 Avorza Range Rover Sport to The Auto Firm in Miami ... where they hooked it up with a Lumma wide body kit and 22-inch Avorza AV7 rims.
We spoke with Auto Firm honcho Alex Vega -- who's done work for stars like Yasiel Puig and Hanley Ramirez -- who tells us Sandoval owns several Range Rovers ... but wanted this one to stand out.
Check out the clip of Sandoval seeing his ride for the first time -- you can tell he's fired up ... and says it's his "favorite" of all his whips.