OS Giken NA/NB Mazda Miata TR Single PlateSingle Plate Clutch overhaul kit B (TR1A) The OS expanded rear differential

The OS expanded rear differential cover is made of cast aluminum and is designed to aid in additional fluid capacity

The aluminum cover allows for higher clamping force (increased capacity) and will handle the hard abuse often found at the track

Toyota Supra JZA80 - V160 Gearbox

These allow the end user to adjust their cam timing for improved torque and powerband

Nissan 350Z (Z33) - VQ35DE

OS Giken NA/NB Mazda Miata TR Single PlateSingle Plate Clutch overhaul kit B (TR1A) The OS expanded rear differentialThe [TR1A] TR Single PlateClutch series line up was designed for vehicles which have substantial increases in engine power. The billet aluminum cover provides a more direct clutch pedal feel, but still maintains ease of engagement due to the unique leverage mechanism of the diaphragm spring to reduce overall pedal effort. The TR1A was designed with Naturally Aspirated engines in mind. This is typically the lightest clutch flywheel assembly you'll find