The ZZPerformance Turbine Shaft is available in a 4340 and 300M. The 300m is rated up to 1000HP and the 4340 up to 600HP. The 4340 shaft is more than adequate for all M90 applications and most others as well. Final grinding on both shafts is done after hardening to prevent inconsistencies.

Improvements Include: 

• Radius'd o-ring groove
• Shaft thickness has been increased in areas of weakness
• Gear play on both sides of the shaft has been reduced
• Center ring groove has been improved
• Brand new diverter tube
• No core charge
• 4340 is more than double the strength of stock and will handle more HP than can be achieved with a supercharged car
• 300M shaft is over 3 times the strength of stock and recommend for turbo builds over 500WHP

ZZP input shafts are guaranteed against defects in material and workmanship. They are not guaranteed against breakage because we cannot control their use in your vehicle.