KIT REAR FDLI DISC/DRUM BOP2.75 OFFSET

The KIT REAR FDLI DISC/DRUM BOP2.75 OFFSET from Wilwood is a comprehensive rear brake conversion system engineered for street machines, muscle cars, and custom hot rods that demand superior stopping power without the complexity of full four-wheel disc conversions. This kit addresses a common modification challenge: upgrading rear braking performance while maintaining drum brake geometry and existing suspension architecture. Builders and mechanics choose this solution when retrofitting classic vehicles or when budgets require a staged brake upgrade approach.

This rear brake assembly combines Wilwood's proven FDLI (Four-Piston Disc/Light Inboard) design with a hybrid disc/drum configuration optimized for BOP (Buick-Oldsmobile-Pontiac) platforms running a 2.75-inch offset specification. The engineering balances proportional braking bias, eliminates traditional drum brake fade during sustained hard braking, and delivers consistent pedal feel across repeated cycles. The 2.75-inch offset is critical for proper caliper-to-rotor clearance and suspension geometry compatibility—mismatched offset causes binding or inadequate pad wear. Wilwood's modular design allows phased installation: retrofit the rear kit now, add front upgrades later as budget permits, all sharing the same master cylinder and proportioning logic.

Technicians and performance enthusiasts working on first- and second-generation BOP muscle cars, Pontiac Bonnevilles, Oldsmobile Cutlasses, and Buick GSX models benefit most from this kit's direct bolt-on design and brake line compatibility. Installation requires attention to wheel clearance, proportioning valve tuning, and brake fluid specs—Wilwood supplies detailed instructions and recommends DOT 4 fluid for maximum fade resistance. The 51-pound assembly ships fully machined; no additional honing or rotor finishing needed. Verify current brake line routing and caliper bracket clearance before ordering to ensure suspension geometry and aftermarket wheel fitment won't interfere with the disc/drum hybrid layout.