Pro-Fit Base Layers - Bottom K20Z Clutch Torque Rating Stage 1

Clutch Torque Rating Stage 1 218 Stage 2 250 Stage 2+ 280

custom designed and proudly manufactured in the US

This turbo features our newly designed 6-Blade Extreme Contour Billet 58mm Compressor Wheel w/ Extended Exducer

FRP hand-laid composite structure built for strength and durability

Pro-Fit Base Layers - Bottom K20Z Clutch Torque Rating Stage 1SFI 3. 3. The NEW Simpson Pro Fit Base Layers are our most comfortable and best fitting base layers. Constructed in Italy using the latest techniques, the Pro Fit provides superior softness and stretchability. The trusted Nomex material gives you an added layer of protection while maintaining breathability and comfort.