Cobra Mod Motor Harmonic Balancer
Std. Dia. with Metco Adapter

Part# 811-963
Only $640.00
SFI 18.1 Harmonic Balancer for Ford 2003-2004 Cobra with Metco and Lightning Force Adapter.

Using the combination of our #811 6 Rib Balancer along with our #963 "Metco" adapter, 03-04 Cobra owners now have an SFI approved option to the stock Balancer. Our adapter is designed to adapt the Metco Motorsports, Lightning Force Performance or Moto Blue interchangable crank pulleys to our SFI approved Balancer.

NOTE: The use of this aftermarket balancer requires the removal of the stock crank support cage. Please see Part #813 for an OEM style Balancer for use with the stock crank support.



  • Dual Keyway Option - Add $20.00
    Add dual keyways for Supercharged or Extreme Duty Applications. Requires double keyed crankshaft snout.
  • Super Duty Hub Option - Add $15.00
    The super duty hub has increased material for supercharged applications.This increased material helps to protect the hub from cracking in high load applications. The super duty hub is recommended for supercharged applications making over 750 rwhp. Includes matching timing cover oil seal.


  • Diameter: Metco Drive Rings
  • Weight: 9.2 lbs
  • Exceeds SFI 18.1 standards and is marked on front with SFI Sticker, and on the rear with SFI number stamped into unit.
  • Works with Metco Motorsports & Lightning Force Performance Interchangeable Pulleys