Action Clutch ACR-1813 Stage 5 2MS (Iron Buttons, 6-Puck Sprung) Incl. Dual HD Pressure Plate+Bearing Kit Subaru WRX 2006-2014 EVOX_2008-2015 we found that the increased

we found that the increased thermal mass of using thicker aluminum tubing (1/8” wall thickness) kept the intake from being vulnerable to rapid temperature change

The difference though

400-2400 Degrees

Part Number: 57-6013

Action Clutch ACR-1813 Stage 5 2MS (Iron Buttons, 6-Puck Sprung) Incl. Dual HD Pressure Plate+Bearing Kit Subaru WRX 2006-2014 EVOX_2008-2015 we found that the increasedPart #: ACR 1813 The Action Clutch stage 5 clutch kit is equipped with iron buttons to provide a higher capacity in power, the clutch features a significant increase in pedal pressure, aggressive engagement, rapid heat dissipation, and outstanding holding capacity. Features: Race Applications Heavy Track use Single dual clamp diaphragm with Iron puck Clutch System. 200 400% INCREASE IN HOLDING CAPACITY. PEDAL FEEL: Heavy with Aggressive Engagement