Add dual keyways for Supercharged or Extreme Duty Applications. Requires double keyed crankshaft snout.
#10019 - Super Duty No Relief Hub Option - Add $15.00
The super duty no relief hub has the relief at the rear of the hub removed for additional crankshaft to damper hub contact for high horsepower supercharged applications. The super duty no relief hub does require extra caution upon installation in order to line the crankshaft keys up with the damper hub keyways.
Weight: 9.6 lbs
Exceeds SFI 18.1 standards and is marked on front with SFI Sticker, and on the rear with SFI number stamped into unit.