Welcome to Grand Theft Answers. What would you like to know?

It depends what vehicle you're driving. If it's a lowrider or tuner then you can only modify it at the right garage for that car. Search the name of the car on GTA wikia to find if its a lowrider or tuner.

See Transfender on Grand Theft Wiki

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.