RB Crank & Cam Timing Sync Kits Upgrade the engine-position sensing setup on your Nissan RB engine with Boost Doc crank and cam sync kits. These kits are designed to provide more consistent engine-position data when used with a compatible aftermarket ECU, helping reduce reliance on the factory Crank Angle Sensor (CAS). Choose from a Lower Crank Sync Kit, Twin Cam Top Sync Kit, or Complete Upper & Lower Sync Kit, depending on your RB engine and setup. Key Features: 1. Lower RB Crank Sync Kit Fits: RB20, RB25, RB26, RB30 and NeoDesigned to provide crankshaft-position data directly to a compatible aftermarket ECU.Includes: Crankshaft timing gear Mounting hardware Stainless steel gear-tooth sensor This setup is intended to reduce potential timing-data issues associated with the factory CAS and provide more consistent crank-position information for tuning. 2. RB Twin Cam Top Sync Kit Fits: Nissan RB Twin Cam engines — RB20, RB25, RB26 and NeoDesigned to work alongside the Lower Crank Sync Kit to provide cam-position information to a compatible aftermarket ECU.Includes: Mounting hardware and brackets Stainless steel gear-tooth sensor When combined with the lower kit, the ECU can use both crankshaft and camshaft position data for engine synchronisation. 3. Complete Engine Position / Sync Kit Fits: Nissan RB Twin Cam engines — RB20, RB25, RB26 and NeoThe complete kit combines the upper cam sync kit and lower crank sync kit into one engine-position solution. By reading crankshaft position and cross-referencing it with camshaft position, the system provides consistent engine-position data to a compatible aftermarket ECU.Includes: Upper cam sync components Lower crank sync components Required mounting hardware Stainless steel gear-tooth sensors Installation & Compatibility Installation requirement: A die grinder or Dremel tool is required to slot the lip of the oil pump for clearance around the lower sensor. ECU compatibility: These kits are designed for use with a compatible aftermarket ECU. The existing product information references systems such as Haltech Platinum Pro. Confirm ECU compatibility and installation requirements before ordering. Choose the lower crank sync kit, upper cam sync kit or complete upper-and-lower package to suit your RB engine and ECU setup.