ECS Direct Drive Belt System 10% OD 8-RIB ECS-100-600

ECS Direct Drive Belt System 10% OD 8-RIB ECS-100-600

The ECS Direct Drive Belt System (ECS-100-600) is a secondary drive for supercharged C5 and C6 Corvettes, here in 8-rib form with 10% overdrive. A Gates cog belt carries power from the harmonic balancer to the accessory drive, so the supercharger runs on its own short belt with maximum wrap. ECS designed it to address slip in other secondary systems.

What's included

• Innovators West SFI balancer built to ECS specifications
• Cog drive pulley assembly with heavy-duty sealed double bearings
• Gates Poly Chain GT Carbon cog belt
• Short Gates Racing 6-rib accessory belt for the power steering and alternator
• Brackets and spacers in US-sourced 6061 aluminum
• Installation instructions

Key specifications

• Supplier part number: ECS-100-600
• Belt: 8-rib, 10% overdrive
• Accessory belt tension comes from a factory GM tensioner
• Supercharger and A/C belts run unaffected by the accessory drive
• Cog belt: polyurethane body, carbon tensile cord, curvilinear tooth profile and nylon tooth facing, with no lubrication or re-tensioning needed
• Works with all centrifugal supercharger systems

Before you order

Everything except the supercharger belt is supplied, because that belt is specific to each setup. The factory alternator bracket must be modified (instructions included), or you can order the optional modified bracket. Send us your year, model and current setup and we will confirm fitment before you order.

See also: all ECS supercharger kits and parts by platform.

Shipping and returns

Shipping is a flat $80.00 per order to US addresses, and returns are free within 15 days of delivery. Questions before you order? Ask a parts specialist.