Bomb & Detonator
The bomb can be planted into your car at 8 Ball's bomb service in the dock area of Vice City. Simply arm the bomb by pressing the "attack" button. Then, anytime from that point on, you can blow the car to smithereens. If the grenade just isn't working, plan ahead and use the car.
here is thelink
not always dude, imagine, you customized a very beautiful lowrider and then you went to LV, while on the freeway to LV, three Linerunners bumped your precious lowrider and ruined it... isn't that just annoying