The Flywheel provides 50% of the friction surface to which the disc mates and consequently provides half the holding power of the clutch system. For maximum disc compatibility we need three elements: a proper friction surface finish, a perfectly flat fiction surface and a friction parallel to the crankshaft flange. RAM's aluminum flywheels have this all this and are balaced to the 1/2 ounce specification. The Flywheel buyers checklist Insist on a SFI certified flywheel Be sure the flywheel has a .225 minimum thickness insert if aluminum Be absolutely certain the flywheel is surface ground perfectly flat and parallel to the crankshaft flange surface. Insist on certification from the manufacturer that the flywheel is dynamically balanced to within 1/2 ounce inch minimum of specification. Ask the manufacturer make the flywheel in house and has complete in house control of the manufacturing process. RAM Flywheels have all the features listed above. Resist the temptation to buy a bargin flywheel. The above features will be absent *This part is over-sized and may incur additional freight* RAM-2525$399.95 Options: 86-95 5.0L99 Cobra/01-04 GT(+8.34)96-00(+8.34) www.realspeedauto.com Ph.631-563-7325 All parts listed are for the Ford Mustang unless otherwise noted. Copyright 2018 Realspeed Automotive Inc. All rights reserved.