Crossover Tube SL6/FSL4 1.25 Rotor

The Wilwood Crossover Tube SL6/FSL4 1.25 Rotor is a precision-engineered brake line connector designed for high-performance hydraulic brake systems using Forged Billet Superlite or Superlite 6 calipers. This crossover tube serves as the critical link between dual-caliper brake circuits, enabling balanced pressure distribution across front or rear brake applications. Whether you're upgrading a street performance vehicle or building a dedicated track car, this component is essential for anyone running modern Wilwood brake packages that demand reliability and consistent stopping power.

Manufactured from forged billet aluminum, the crossover tube features a 1.25-inch rotor compatibility specification, which directly correlates to caliper bore size and brake pad swept area in Wilwood's modular brake architecture. The tube's compact footprint—measuring 5.75 x 0.65 x 7.85 inches and weighing just 0.27 lbs—makes it ideal for tight engine bay or frame-rail installations without sacrificing flow capacity. Wilwood's billet construction ensures exceptional strength-to-weight ratio and resistance to thermal expansion, critical factors when braking temperatures exceed 300°F on spirited driving or competition. The precision-ported internal geometry optimizes brake fluid flow, minimizing pressure loss and maintaining pedal response across aggressive stop-and-go scenarios.

This crossover tube set of four is ideal for builders installing Wilwood SL6 or FSL4 brake systems on road-course vehicles, autocross platforms, or street machines where dual-piston calipers demand proportional brake balance. Installation typically requires standard brake line fittings and is compatible with 1.25-inch rotor packages across most Wilwood modular platforms. Proper sizing ensures your braking system maintains even force distribution, preventing lock-up bias and guaranteeing predictable stopping performance from corner entry through final pedal release.