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His Lingenfelter 720 package already comes with a 9.17 lower pulley.
"Produces 720 HP and 730 lb-ft of torque at the flywheel
The 720 HP kit includes:
- Lingenfelter/ATI LT4 dry sump torsional vibration damper
- Lingenfelter 9.17 diameter overdrive supercharger drive damper pulley
- Pulley fasteners
- Supercharger belt
- Crankshaft bolt
- Diagnostic port cover kit
Additional items not included but required:
- For the ZL1 Camaro we suggest a Rotofab high flow air intake kit
- ECM calibration
- Lingenfelter designed, developed and tested package of components proven to work together
Crank bolt torque with red loctite 59 ft lbs plus 200 degrees"
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