Radium Engineering Fuel Pulse Damper Kit | 1993-1998 Toyota Supra (20-0389)

Big injectors hammer the 2JZ's rail pressure in waves; the damper flattens them.

The Radium Engineering Fuel Pulse Damper Kit for the MK4 Supra adds pulse damping to the JZA80's fuel system: a Radium FPD with Supra-specific fitment, absorbing the pressure oscillations large injectors generate so delivered fuel matches commanded fuel. The tuning-stability upgrade big-injector 2JZ builds quietly need.

What You'll Feel

• Steadier fuel pressure at the rail as injector size climbs
• Cleaner idle and tune consistency on big-injector setups
• Injector-induced pressure waves absorbed before they compound

Features

• Fuel pulse damper kit for the 1993-1998 Toyota Supra MK4 (JZA80)
• Radium FPD with Supra-specific fitment and hardware
• All fuel types including E85

The Details

Every injector event slams the rail with a pressure wave, and small injectors make small waves the factory system shrugs off, but the 1000cc-class hardware big 2JZ builds run generates oscillations that beat against the regulator and read as fueling noise in the logs; the damper's diaphragm absorbs them at the source. Radium's FPD-R architecture serves the damping across the fuel range including E85, and the kit's Supra-specific fitment lands it in the JZA80's plumbing without fabrication. Install per Radium's instructions, and the datalogs smooth out where the waves used to live.

Kit Includes

• 1x Radium fuel pulse damper with Supra-specific fitment hardware (20-0389)

Applications

• 1993-1998 Toyota Supra MK4 (JZA80, 2JZ-GTE)
• Companion to Radium 2JZ rail and fuel system installations