TN Racing JP-804 Hard Spring for TRF421 (No Marking)

Master high-speed stability with these competition-grade hard springs that deliver exceptional chassis control without sacrificing crucial track feedback. Engineered with the same specialized steel as TN Racing’s acclaimed Highfeel series, these springs provide racers with unparalleled handling precision.

Key Features

• Track-developed compound– High-carbon steel formulation for responsive feel

• Machined contact surfaces– Laser-flattened ends maintain consistent preload

• Performance-first design– Uncoated finish preserves spring dynamics

• Reverse coil orientation– Right-hand wound unlike factory SSBB springs

Why Serious Racers Choose These

• Predictable breakaway– Communicates traction limits clearly

• Controlled weight transfer– Manages aggressive driving inputs

• Stable platform– Resists unwanted chassis roll

• Endurance construction– Maintains rate through long sessions

Technical Specifications

• Spring rate:Hard

• Material:High-feel specialty steel

• Surface treatment:Raw unplated metal

• Coil direction:Right-hand wound

• Compatibility:TRF421 with SSBB dampers

Track Advantages

• Ideal for high-traction asphalt

• Perfect for powerful modified setups

• Works with slick tire compounds

• Enhances high-speed cornering

Transform your TRF421 into a precision instrument with these professionally engineered springs that bridge the gap between maximum support and sensitive feedback.