"That factory is the heart of their drug empire. Drive 8-Ball's rigged car down into the basement, set the timer, and blow it sky high!" - Wu Zi Mu
Yay Ka-Boom-Boom is the cinematic grand finale of the San Fierro storyline in Grand Theft Auto: San Andreas. With Jizzy B and T-Bone Mendez dead, the final remnants of the Loco Syndicate are manufacturing crack cocaine inside an industrial factory complex in Doherty.
Carl Johnson partners with demolition expert 8-Ball to rig a sedan with military grade explosives. CJ must breach the factory compound, drive the car bomb deep into the underground laboratory, arm the detonation countdown, fight through waves of armed Rifa guards in under 40 seconds, and execute a daring vehicular ramp jump over the locked security gates.
Mission Briefing and Requirements
- Mission Giver: Wu Zi Mu (The Four Dragons / San Fierro)
- Location: Doherty Industrial Complex, San Fierro
- Target Difficulty: Hard
- Reward: $25,000 cash, Respect +, Unlocks the Desert and Las Venturas acts
- Recommended Loadout: Combat Shotgun, M4 or AK-47, SMG, 100% Body Armor.
Preparation: Weapons & Ammunition
The indoor firefight takes place under a strict 40-second countdown timer. You cannot afford to hide behind cover while reloading slow weapons. Visit Ammu-Nation or grab free spawns using our Hidden Weapons Guide so you carry at least 300 rounds of M4 ammunition and a fast-firing Combat Shotgun.
Step-by-Step Tactical Walkthrough
Phase 1: Collecting the Car Bomb from 8-Ball
After the mission briefing at the garage, drive to 8-Ball's bomb shop in south San Fierro. Enter the wired sedan loaded with plastic explosives:
- Drive carefully through the streets of San Fierro toward Doherty.
- Avoid crashing into civilian traffic or police cars; heavy impacts damage the car's structural integrity, risking premature detonation.
- Pull up to the gated entrance of the crack factory compound. Two armed security guards stand at the gate. Run them down or eliminate them with drive-by fire to open the sliding gate.
Phase 2: Breaching the Factory Courtyard
Once inside the perimeter:
- Multiple Rifa guards will open fire on your car from shipping containers and catwalks.
- Do not stop to engage them on foot. Stay in the car and drive directly toward the underground concrete ramp on the left side of the courtyard.
- Descend the ramp into the subterranean chemical processing laboratory.
Phase 3: Arming the Bomb in the Laboratory
Drive past the storage vats until you reach the marked red cylinder at the back of the basement:
- Park the car squarely inside the red marker between the chemical storage tanks.
- Press the action button to activate the 40-second countdown timer.
- Exit the vehicle immediately and equip your Combat Shotgun or M4 rifle.
Phase 4: Beating the 40-Second Countdown
This is where most players fail. As soon as the timer begins, heavy security guards pour down the staircase:
- Sprint continuously forward toward the exit ramp. Do not crouch or take cover behind crates.
- Fire continuous bursts into enemies directly in front of you. A Combat Shotgun clears two guards per blast.
- Ascend the stairs and exit through the doors into the upper courtyard before the clock reaches zero.
- A massive explosion rocks the facility as the subterranean basement collapses in flames.
Phase 5: The Ramp Jump Escape
With the factory destroyed, the compound's heavy security gates lock automatically, trapping CJ inside with angry surviving guards:
- Clear out the two guards shooting at you from the courtyard parking spots.
- Steal one of the surviving cars (a Tampa or Glendale) parked in the compound.
- Turn the car around and look toward the southwest factory roof. A wooden ramp made from scaffolding leads up toward the roofline.
- Back up against the far wall to give yourself maximum runway distance.
- Floor the accelerator in a straight line up the ramp. Hit the crest at full speed to launch the car completely over the locked concrete perimeter wall.
- Land on the city street outside and drive back to the Doherty garage to complete the mission.
Mission Rewards & Storyline Progression
- Direct Cash Payout: $25,000 cash bonus.
- Respect Bonus: Significant boost to gang respect.
- The Big Phone Call: Shortly after finishing, CJ receives a call from an unknown disguised voice instructing him to travel to the desert airstrip in Bone County. This reveals that Mike Toreno survived the helicopter explosion and begins the Desert Operations / Las Venturas Act.
Video Walkthrough: Yay Ka-Boom-Boom
Frequently Asked Questions
How much time do you have to escape the factory in Yay Ka-Boom-Boom?
Once you arm the car bomb in the processing basement, you have exactly 40 seconds to sprint out of the basement and reach the outdoor factory courtyard before the explosion levels the building.
How do you jump over the locked factory gate at the end of the mission?
Steal one of the San Fierro Rifa cars (a Tampa or Glendale) parked in the courtyard. Drive toward the southwest warehouse building, line up with the wooden ramp, and accelerate at full throttle to launch over the perimeter wall onto the street below.
What happens if the bomb car takes too much damage on the way to the factory?
The bomb car has a standard vehicle health meter. If you crash repeatedly or let security guards shoot the car until it catches fire before parking it in the basement, the bomb will detonate prematurely, killing CJ and failing the mission.
What does Yay Ka-Boom-Boom unlock in GTA San Andreas?
Yay Ka-Boom-Boom completes the San Fierro storyline. It unlocks a phone call from a mysterious voice (Mike Toreno), granting access to the desert region of Tierra Robada, Bone County, and Verdant Meadows Airfield.
What is the best weapon for the factory basement firefight?
An M4 rifle or Combat Shotgun is ideal. Both weapons eliminate guards in one or two hits, allowing you to sprint past enemies without slowing down during the 40-second countdown.