Rear engine compartments on V-drive boats often sit with empty, unweighted locker zones that limit wave heights, making the FatSac V-Drive Ballast Bags pair an essential heavyweight displacement upgrade. FatSac engineered this matching pair of W701 Pro-X series bladders to contour perfectly inside the port and starboards lockers flanking your inboard motor block. Pushing a combined 800 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, ensuring wakeboarding launch lines stay tall. Every wave lip breaks cleanly.

This industrial twin skin uses proprietary, layered Valmex heavy-duty 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 V-Drive Ballast Bags

- 800 lbs Total Ballast Set: Adds 400 lbs of dense water weight per sac to let you equalize your port and starboard tracking wave planes.
- Snug Locker Profile Dimensions: Sized at 42 x 16 x 16 inches per bag to directly replace small factory ballast bladders in V-drive compartments.
- 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.
- 4-Port Inset Valve Layout: Outfits each bag with two valves on top and one on each end to support clean, dual-pump routing options.
- High-Flow Quick Connect Kit: Packs essential fittings including two W731, one W749, and one W730 quick-twist connectors per sac out of the box.
- Universal Pump Compliance: Links directly with Supa Pump 3.0 and standard 1-inch Tsunami ballast pumping systems for rapid fill cycles.
- USA Commercial Fabrication: Constructs every dual pack by hand in the USA to ensure professional marine-grade material strength and long life.

Dual Rear Engine Locker Ballast & Wave Optimization

This matching rear sac pair functions as the ultimate fine-tuning weapon for V-drive boat owners who need to weight the transom area without cluttering the main cabin deck. Splitting the weight along the engine box shapes clean, crisp wave lips on either side.

Our road crew loaded this matching pair of V-drive sacs into the rear compartments flanking an inboard engine. The compact 42-inch length is a major asset; both bags slid into place without rubbing against moving belts. Filling them completely equalized our hull stance, removing the messy wash spray from the wave lip within minutes and creating a steep surf pocket.

Why Choose FatSac V-Drive Ballast Bags

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 V-Drive pair 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 matching twin set with an official 1 Year Limited Manufacturer Warranty covering material and bonding 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 pair dry.