Empty rear engine compartments often sit with unweighted locker zones that limit wave heights, making the FatSac Pro X V-Drive Surf Sac Ballast an essential heavyweight displacement upgrade. FatSac engineered this Pro-X series rear locker bladder to contour perfectly inside the port or starboard compartments flanking your inboard motor block. Pushing an additional 400 lbs of water weight into the transom forces the rear hull deep, expanding the length of your wakesurf power pocket. The dense rear placement holds the craft secure on edge. Every wave lip breaks cleanly.

This industrial ballast skin uses proprietary, layered UV-stabilized Valmex polyvinyl fabric engineered to withstand raw friction against raw fiberglass stringers. High-frequency welded and pressure seam-taped connections eliminate traditional puncture splits and abrasion failures when stuffed into tight engine areas. Captains installing automated drainage lines frequently match these high-flow inset valves with parts in our specialized boat wakeboard package sets collection to maximize flow. Quick-connect fittings handle automated setups.

Key Features of FatSac Pro X V-Drive Surf Sac Ballast

- 400 lbs Added Ballast: Displaces approximately 48 US gallons of dense water weight per sac to maximize rear-end transom depth and wave height.
- Valmex Polyvinyl Material: Formulates an ultra-rugged marine fabric skin that delivers extreme resistance against sun baking and chemical engine fumes.
- High-Frequency Pressure Welds: Fuses all structural joints with taped burst-proof seam technology to prevent high-volume splitting under heavy load.
- Snug Locker Profile Dimensions: Measures 42 x 16 x 16 inches to fit snugly inside standard V-drive rear locker engine compartments.
- 4 Inset Valve Ports: Positions two valves on top and one on each end to support clean, dual-pump plug-and-play hose routing options.
- Turnkey Fitting Kit Included: Packs essential high-flow fittings including one W730 supa-fitting, one W749 air release, and two ballast plugs out of the box.
- Universal Pump Compliance: Mates directly with Supa Pump S7090 and standard factory plug-and-play inboard ballast plumbing loops.
- USA Handmade Precision: Constructs every ballast bladder by hand in the USA to guarantee industry-leading material strength and zero factory leaks.

Rear Compartment Ballast Balancing & Wakesurf Wave Optimization

This 400 lbs rear engine locker sac serves as the industry standard for creating deep, powerful wave pockets behind inboard wake boats. Placing a bag in each rear compartment forces the transom down, generating a steep wave face that lets surfers drop the rope safely.

Our boat crew integrated this 400 lbs ballast bag into a tight rear engine locker. The four inset valve ports are an awesome asset, letting us route our fill and vent hoses cleanly without any kinking or tight hose pinching under the engine hatches. It held its pressure perfectly all day, adding serious transom weight that smoothed out our wakeboarding wash.

Why Choose FatSac Pro X V-Drive Surf Sac Ballast

Standard thin water bladders melt, crack, or rot when exposed to hot engine bay temperatures and raw fuel fumes, causing massive interior leaks that short out bilge electronics. The FatSac Pro-X series bag prevents this expensive damage by wrapping your ballast inside a chemical-resistant, heavy-duty vinyl shell, protecting your boat plumbing budget.

Factory Warranty & Professional Care Guidelines

FatSac backs this heavy-duty ballast sac with an official 1 Year Limited Manufacturer Warranty covering material and seam defects. To keep the Valmex polyvinyl flexible and ensure clean pumping performance, clear away raw oil or fuel fumes from the skin after use. Always store the bladder dry.