Valve Train Components for 2006 Chevrolet Corvette
Categories
- Aero Ground Effects & Body Kits
- Aperture Panel
- Brackets, Flanges & Hangers
- Bumper
- Bumper & Components - Front
- Bumper & Components - Rear
- Center Console
- Cluster & Switches
- Console
- Control Cables
- Control Modules
- Convertible Top
- Cover & Components
- Cowl
- Dashboard
- Door & Components
- Doors
- Driver Seat Components
- Ducts
- Exterior Trim - Quarter Panel
- Exterior Trim - Roof
- Fender & Components
- Fenders
- Floor
- Frame
- Frame & Components
- Front Console
- Front Door
- Gaskets & Sealing Systems
- Gate & Hardware
- Glass - Door
- Glass - Lift Gate
- Glass - Windshield
- Glass, Windows & Related Components
- Glove Box
- Grille
- Hardware, Fasteners & Fittings
- Hinge Pillar
- Hood
- Hood & Components
- Horns
- Information Labels
- Instrument Panel
- Interior Trim - Door
- Interior Trim - Pillars
- Interior Trim - Quarter Panels
- Interior Trim - Rear Body
- Interior Trim - Roof
- Interior Trim - Top
- Labels
- Lid & Components
- Liftgate
- Lock & Hardware
- Lock Pillar
- Master Cylinder - Components On Dash Panel
- Mirrors
- Motor & Components
- Outside Mirrors
- Passenger Seat Components
- Quarter Panel
- Quarter Panel & Components
- Radiator Support
- Rear Body
- Rear Floor & Rails
- Roof
- Roof & Components
- Seat Belt
- Seats
- Sound System
- Spoiler
- Steering Wheel
- Storage Compartment
- Switches, Solenoids & Actuators
- Top & Components
- Truck Box
- Trunk
- Trunk Lid & Compartment
- Windshield Header & Components
- Wiper & Washer Components
- ABS Components
- Anti-Lock Brakes
- Body Wiring Harness & Components
- Brackets, Flanges & Hangers
- Brake Components
- Brake Hydraulics
- Control Modules
- Disc Pads & Brake Shoes
- Drums & Rotors
- Front Brakes
- Hardware, Fasteners & Fittings
- Hoses & Pipes
- Hydraulic System
- Parking Brake
- Rear Brakes
- Service Kits
- Stability Control
- Switches, Solenoids & Actuators
- Traction Control
- Valves
- ABS Components
- Air Bag Components
- Air Bag System
- Alarm System
- Alternator
- Alternator/Generator & Related Components
- Antenna & Radio
- Anti-Theft Components
- Anti-Theft System
- Backup Lamps
- Battery
- Battery & Related Components
- Brackets, Flanges & Hangers
- Bulbs - Chassis
- Control Modules
- Controls
- Convertible Top
- Door
- Doors
- Electrical Components
- Electrical Connectors
- Electrical Sockets
- Flasher Units, Fuses, & Circuit Breakers
- Fog Lamps
- Front Seat Belts
- Fuel Door
- Fuse & Relay
- Hardware, Fasteners & Fittings
- Headlamp Components
- Headlamp Washers/Wipers
- Heated Seats
- High Mounted Stop Lamp
- Horn
- Ignition Lock
- Ignition System
- Instruments & Gauges
- Keyless Entry Components
- License Lamps
- Lighting - Exterior
- Lighting - Interior
- Lumbar Control Seats
- Mobile Multi-Media
- Navigation System
- Navigation System Components
- Power Outlets
- Power Seats
- Powertrain Control
- Relays
- Ride Control Components
- Senders
- Sensors
- Side Marker Lamps
- Starter
- Starter & Related Components
- Steering Column
- Switches
- Switches, Solenoids & Actuators
- Tail Lamps
- Tire Pressure Monitor Components
- Trunk
- Washer Components
- Window Defroster
- Wipers
- Wire, Cable & Related Components
- Air Cleaner
- Bearings
- Brackets, Flanges & Hangers
- Control Modules
- Cylinder Block Components
- Engine
- Engine & Trans Mounting
- Engine Appearance Cover
- Engine Parts
- Filters
- Gaskets & Sealing Systems
- Hardware, Fasteners & Fittings
- Mounts
- Oil Pan
- Oil Pump
- Pumps
- Switches, Solenoids & Actuators
- Valve Train Components
- Wire, Cable & Related Components
- A/C Clutch & Compressor
- A/C Condenser & Evaporator
- A/C Flow Restrictors
- Automatic Temperature Controls
- Blower Motor & Fan
- Brackets, Flanges & Hangers
- Condenser, Compressor & Lines
- Controls
- Evaporator & Heater Components
- Filters
- Gaskets & Sealing Systems
- Hardware, Fasteners & Fittings
- Heater
- Hoses & Pipes
- HVAC Case
- Motors, Core, Case & Related Components
- Relays
- Sensors
- Switches & Sensors
- Switches, Solenoids & Actuators
- Temperature Controls & Related Components
- Wire, Cable & Related Components
- Bearings
- Brackets, Flanges & Hangers
- Bushings
- Gaskets & Sealing Systems
- Hardware, Fasteners & Fittings
- Housing & Components
- Motors
- P/S Pump & Hoses
- Power Steering Hoses, Pumps, & Related Components
- Pump & Hoses
- Shroud, Switches & Levers
- Steering Column
- Steering Column Assembly
- Steering Gear & Linkage
- Steering Wheel
- Steering Wheel & Trim
- Steering, Gear & Related Components
- Switches, Solenoids & Actuators
- Wire, Cable & Related Components
- Alignment
- Axle & Differential
- Brackets, Flanges & Hangers
- Bushings
- Carrier & Front Axles
- Control Modules
- Covers & Trim
- Front Suspension
- Hardware, Fasteners & Fittings
- Rear Suspension
- Ride Control
- Sensors
- Shocks & Struts
- Stabilizer Bar & Components
- Suspension Components
- Suspension, Springs & Related Components
- Switches, Solenoids & Actuators
- Upper Control Arm
- Wheels
- Aero Ground Effects & Body Kits
- Aperture Panel
- Brackets, Flanges & Hangers
- Bumper
- Bumper & Components - Front
- Bumper & Components - Rear
- Center Console
- Cluster & Switches
- Console
- Control Cables
- Control Modules
- Convertible Top
- Cover & Components
- Cowl
- Dashboard
- Door & Components
- Doors
- Driver Seat Components
- Ducts
- Exterior Trim - Quarter Panel
- Exterior Trim - Roof
- Fender & Components
- Fenders
- Floor
- Frame
- Frame & Components
- Front Console
- Front Door
- Gaskets & Sealing Systems
- Gate & Hardware
- Glass - Door
- Glass - Lift Gate
- Glass - Windshield
- Glass, Windows & Related Components
- Glove Box
- Grille
- Hardware, Fasteners & Fittings
- Hinge Pillar
- Hood
- Hood & Components
- Horns
- Information Labels
- Instrument Panel
- Interior Trim - Door
- Interior Trim - Pillars
- Interior Trim - Quarter Panels
- Interior Trim - Rear Body
- Interior Trim - Roof
- Interior Trim - Top
- Labels
- Lid & Components
- Liftgate
- Lock & Hardware
- Lock Pillar
- Master Cylinder - Components On Dash Panel
- Mirrors
- Motor & Components
- Outside Mirrors
- Passenger Seat Components
- Quarter Panel
- Quarter Panel & Components
- Radiator Support
- Rear Body
- Rear Floor & Rails
- Roof
- Roof & Components
- Seat Belt
- Seats
- Sound System
- Spoiler
- Steering Wheel
- Storage Compartment
- Switches, Solenoids & Actuators
- Top & Components
- Truck Box
- Trunk
- Trunk Lid & Compartment
- Windshield Header & Components
- Wiper & Washer Components
- ABS Components
- Anti-Lock Brakes
- Body Wiring Harness & Components
- Brackets, Flanges & Hangers
- Brake Components
- Brake Hydraulics
- Control Modules
- Disc Pads & Brake Shoes
- Drums & Rotors
- Front Brakes
- Hardware, Fasteners & Fittings
- Hoses & Pipes
- Hydraulic System
- Parking Brake
- Rear Brakes
- Service Kits
- Stability Control
- Switches, Solenoids & Actuators
- Traction Control
- Valves
- ABS Components
- Air Bag Components
- Air Bag System
- Alarm System
- Alternator
- Alternator/Generator & Related Components
- Antenna & Radio
- Anti-Theft Components
- Anti-Theft System
- Backup Lamps
- Battery
- Battery & Related Components
- Brackets, Flanges & Hangers
- Bulbs - Chassis
- Control Modules
- Controls
- Convertible Top
- Door
- Doors
- Electrical Components
- Electrical Connectors
- Electrical Sockets
- Flasher Units, Fuses, & Circuit Breakers
- Fog Lamps
- Front Seat Belts
- Fuel Door
- Fuse & Relay
- Hardware, Fasteners & Fittings
- Headlamp Components
- Headlamp Washers/Wipers
- Heated Seats
- High Mounted Stop Lamp
- Horn
- Ignition Lock
- Ignition System
- Instruments & Gauges
- Keyless Entry Components
- License Lamps
- Lighting - Exterior
- Lighting - Interior
- Lumbar Control Seats
- Mobile Multi-Media
- Navigation System
- Navigation System Components
- Power Outlets
- Power Seats
- Powertrain Control
- Relays
- Ride Control Components
- Senders
- Sensors
- Side Marker Lamps
- Starter
- Starter & Related Components
- Steering Column
- Switches
- Switches, Solenoids & Actuators
- Tail Lamps
- Tire Pressure Monitor Components
- Trunk
- Washer Components
- Window Defroster
- Wipers
- Wire, Cable & Related Components
- Air Cleaner
- Bearings
- Brackets, Flanges & Hangers
- Control Modules
- Cylinder Block Components
- Engine
- Engine & Trans Mounting
- Engine Appearance Cover
- Engine Parts
- Filters
- Gaskets & Sealing Systems
- Hardware, Fasteners & Fittings
- Mounts
- Oil Pan
- Oil Pump
- Pumps
- Switches, Solenoids & Actuators
- Valve Train Components
- Wire, Cable & Related Components
- A/C Clutch & Compressor
- A/C Condenser & Evaporator
- A/C Flow Restrictors
- Automatic Temperature Controls
- Blower Motor & Fan
- Brackets, Flanges & Hangers
- Condenser, Compressor & Lines
- Controls
- Evaporator & Heater Components
- Filters
- Gaskets & Sealing Systems
- Hardware, Fasteners & Fittings
- Heater
- Hoses & Pipes
- HVAC Case
- Motors, Core, Case & Related Components
- Relays
- Sensors
- Switches & Sensors
- Switches, Solenoids & Actuators
- Temperature Controls & Related Components
- Wire, Cable & Related Components
- Bearings
- Brackets, Flanges & Hangers
- Bushings
- Gaskets & Sealing Systems
- Hardware, Fasteners & Fittings
- Housing & Components
- Motors
- P/S Pump & Hoses
- Power Steering Hoses, Pumps, & Related Components
- Pump & Hoses
- Shroud, Switches & Levers
- Steering Column
- Steering Column Assembly
- Steering Gear & Linkage
- Steering Wheel
- Steering Wheel & Trim
- Steering, Gear & Related Components
- Switches, Solenoids & Actuators
- Wire, Cable & Related Components
- Alignment
- Axle & Differential
- Brackets, Flanges & Hangers
- Bushings
- Carrier & Front Axles
- Control Modules
- Covers & Trim
- Front Suspension
- Hardware, Fasteners & Fittings
- Rear Suspension
- Ride Control
- Sensors
- Shocks & Struts
- Stabilizer Bar & Components
- Suspension Components
- Suspension, Springs & Related Components
- Switches, Solenoids & Actuators
- Upper Control Arm
- Wheels
Browse Categories
Select category
- Aero Ground Effects & Body Kits
- Aperture Panel
- Brackets, Flanges & Hangers
- Bumper
- Bumper & Components - Front
- Bumper & Components - Rear
- Center Console
- Cluster & Switches
- Console
- Control Cables
- Control Modules
- Convertible Top
- Cover & Components
- Cowl
- Dashboard
- Door & Components
- Doors
- Driver Seat Components
- Ducts
- Exterior Trim - Quarter Panel
- Exterior Trim - Roof
- Fender & Components
- Fenders
- Floor
- Frame
- Frame & Components
- Front Console
- Front Door
- Gaskets & Sealing Systems
- Gate & Hardware
- Glass - Door
- Glass - Lift Gate
- Glass - Windshield
- Glass, Windows & Related Components
- Glove Box
- Grille
- Hardware, Fasteners & Fittings
- Hinge Pillar
- Hood
- Hood & Components
- Horns
- Information Labels
- Instrument Panel
- Interior Trim - Door
- Interior Trim - Pillars
- Interior Trim - Quarter Panels
- Interior Trim - Rear Body
- Interior Trim - Roof
- Interior Trim - Top
- Labels
- Lid & Components
- Liftgate
- Lock & Hardware
- Lock Pillar
- Master Cylinder - Components On Dash Panel
- Mirrors
- Motor & Components
- Outside Mirrors
- Passenger Seat Components
- Quarter Panel
- Quarter Panel & Components
- Radiator Support
- Rear Body
- Rear Floor & Rails
- Roof
- Roof & Components
- Seat Belt
- Seats
- Sound System
- Spoiler
- Steering Wheel
- Storage Compartment
- Switches, Solenoids & Actuators
- Top & Components
- Truck Box
- Trunk
- Trunk Lid & Compartment
- Windshield Header & Components
- Wiper & Washer Components
- ABS Components
- Anti-Lock Brakes
- Body Wiring Harness & Components
- Brackets, Flanges & Hangers
- Brake Components
- Brake Hydraulics
- Control Modules
- Disc Pads & Brake Shoes
- Drums & Rotors
- Front Brakes
- Hardware, Fasteners & Fittings
- Hoses & Pipes
- Hydraulic System
- Parking Brake
- Rear Brakes
- Service Kits
- Stability Control
- Switches, Solenoids & Actuators
- Traction Control
- Valves
- ABS Components
- Air Bag Components
- Air Bag System
- Alarm System
- Alternator
- Alternator/Generator & Related Components
- Antenna & Radio
- Anti-Theft Components
- Anti-Theft System
- Backup Lamps
- Battery
- Battery & Related Components
- Brackets, Flanges & Hangers
- Bulbs - Chassis
- Control Modules
- Controls
- Convertible Top
- Door
- Doors
- Electrical Components
- Electrical Connectors
- Electrical Sockets
- Flasher Units, Fuses, & Circuit Breakers
- Fog Lamps
- Front Seat Belts
- Fuel Door
- Fuse & Relay
- Hardware, Fasteners & Fittings
- Headlamp Components
- Headlamp Washers/Wipers
- Heated Seats
- High Mounted Stop Lamp
- Horn
- Ignition Lock
- Ignition System
- Instruments & Gauges
- Keyless Entry Components
- License Lamps
- Lighting - Exterior
- Lighting - Interior
- Lumbar Control Seats
- Mobile Multi-Media
- Navigation System
- Navigation System Components
- Power Outlets
- Power Seats
- Powertrain Control
- Relays
- Ride Control Components
- Senders
- Sensors
- Side Marker Lamps
- Starter
- Starter & Related Components
- Steering Column
- Switches
- Switches, Solenoids & Actuators
- Tail Lamps
- Tire Pressure Monitor Components
- Trunk
- Washer Components
- Window Defroster
- Wipers
- Wire, Cable & Related Components
- Air Cleaner
- Bearings
- Brackets, Flanges & Hangers
- Control Modules
- Cylinder Block Components
- Engine
- Engine & Trans Mounting
- Engine Appearance Cover
- Engine Parts
- Filters
- Gaskets & Sealing Systems
- Hardware, Fasteners & Fittings
- Mounts
- Oil Pan
- Oil Pump
- Pumps
- Switches, Solenoids & Actuators
- Valve Train Components
- Wire, Cable & Related Components
- A/C Clutch & Compressor
- A/C Condenser & Evaporator
- A/C Flow Restrictors
- Automatic Temperature Controls
- Blower Motor & Fan
- Brackets, Flanges & Hangers
- Condenser, Compressor & Lines
- Controls
- Evaporator & Heater Components
- Filters
- Gaskets & Sealing Systems
- Hardware, Fasteners & Fittings
- Heater
- Hoses & Pipes
- HVAC Case
- Motors, Core, Case & Related Components
- Relays
- Sensors
- Switches & Sensors
- Switches, Solenoids & Actuators
- Temperature Controls & Related Components
- Wire, Cable & Related Components
- Bearings
- Brackets, Flanges & Hangers
- Bushings
- Gaskets & Sealing Systems
- Hardware, Fasteners & Fittings
- Housing & Components
- Motors
- P/S Pump & Hoses
- Power Steering Hoses, Pumps, & Related Components
- Pump & Hoses
- Shroud, Switches & Levers
- Steering Column
- Steering Column Assembly
- Steering Gear & Linkage
- Steering Wheel
- Steering Wheel & Trim
- Steering, Gear & Related Components
- Switches, Solenoids & Actuators
- Wire, Cable & Related Components
- Alignment
- Axle & Differential
- Brackets, Flanges & Hangers
- Bushings
- Carrier & Front Axles
- Control Modules
- Covers & Trim
- Front Suspension
- Hardware, Fasteners & Fittings
- Rear Suspension
- Ride Control
- Sensors
- Shocks & Struts
- Stabilizer Bar & Components
- Suspension Components
- Suspension, Springs & Related Components
- Switches, Solenoids & Actuators
- Upper Control Arm
- Wheels
- Aero Ground Effects & Body Kits
- Aperture Panel
- Brackets, Flanges & Hangers
- Bumper
- Bumper & Components - Front
- Bumper & Components - Rear
- Center Console
- Cluster & Switches
- Console
- Control Cables
- Control Modules
- Convertible Top
- Cover & Components
- Cowl
- Dashboard
- Door & Components
- Doors
- Driver Seat Components
- Ducts
- Exterior Trim - Quarter Panel
- Exterior Trim - Roof
- Fender & Components
- Fenders
- Floor
- Frame
- Frame & Components
- Front Console
- Front Door
- Gaskets & Sealing Systems
- Gate & Hardware
- Glass - Door
- Glass - Lift Gate
- Glass - Windshield
- Glass, Windows & Related Components
- Glove Box
- Grille
- Hardware, Fasteners & Fittings
- Hinge Pillar
- Hood
- Hood & Components
- Horns
- Information Labels
- Instrument Panel
- Interior Trim - Door
- Interior Trim - Pillars
- Interior Trim - Quarter Panels
- Interior Trim - Rear Body
- Interior Trim - Roof
- Interior Trim - Top
- Labels
- Lid & Components
- Liftgate
- Lock & Hardware
- Lock Pillar
- Master Cylinder - Components On Dash Panel
- Mirrors
- Motor & Components
- Outside Mirrors
- Passenger Seat Components
- Quarter Panel
- Quarter Panel & Components
- Radiator Support
- Rear Body
- Rear Floor & Rails
- Roof
- Roof & Components
- Seat Belt
- Seats
- Sound System
- Spoiler
- Steering Wheel
- Storage Compartment
- Switches, Solenoids & Actuators
- Top & Components
- Truck Box
- Trunk
- Trunk Lid & Compartment
- Windshield Header & Components
- Wiper & Washer Components
- ABS Components
- Anti-Lock Brakes
- Body Wiring Harness & Components
- Brackets, Flanges & Hangers
- Brake Components
- Brake Hydraulics
- Control Modules
- Disc Pads & Brake Shoes
- Drums & Rotors
- Front Brakes
- Hardware, Fasteners & Fittings
- Hoses & Pipes
- Hydraulic System
- Parking Brake
- Rear Brakes
- Service Kits
- Stability Control
- Switches, Solenoids & Actuators
- Traction Control
- Valves
- ABS Components
- Air Bag Components
- Air Bag System
- Alarm System
- Alternator
- Alternator/Generator & Related Components
- Antenna & Radio
- Anti-Theft Components
- Anti-Theft System
- Backup Lamps
- Battery
- Battery & Related Components
- Brackets, Flanges & Hangers
- Bulbs - Chassis
- Control Modules
- Controls
- Convertible Top
- Door
- Doors
- Electrical Components
- Electrical Connectors
- Electrical Sockets
- Flasher Units, Fuses, & Circuit Breakers
- Fog Lamps
- Front Seat Belts
- Fuel Door
- Fuse & Relay
- Hardware, Fasteners & Fittings
- Headlamp Components
- Headlamp Washers/Wipers
- Heated Seats
- High Mounted Stop Lamp
- Horn
- Ignition Lock
- Ignition System
- Instruments & Gauges
- Keyless Entry Components
- License Lamps
- Lighting - Exterior
- Lighting - Interior
- Lumbar Control Seats
- Mobile Multi-Media
- Navigation System
- Navigation System Components
- Power Outlets
- Power Seats
- Powertrain Control
- Relays
- Ride Control Components
- Senders
- Sensors
- Side Marker Lamps
- Starter
- Starter & Related Components
- Steering Column
- Switches
- Switches, Solenoids & Actuators
- Tail Lamps
- Tire Pressure Monitor Components
- Trunk
- Washer Components
- Window Defroster
- Wipers
- Wire, Cable & Related Components
- Air Cleaner
- Bearings
- Brackets, Flanges & Hangers
- Control Modules
- Cylinder Block Components
- Engine
- Engine & Trans Mounting
- Engine Appearance Cover
- Engine Parts
- Filters
- Gaskets & Sealing Systems
- Hardware, Fasteners & Fittings
- Mounts
- Oil Pan
- Oil Pump
- Pumps
- Switches, Solenoids & Actuators
- Valve Train Components
- Wire, Cable & Related Components
- A/C Clutch & Compressor
- A/C Condenser & Evaporator
- A/C Flow Restrictors
- Automatic Temperature Controls
- Blower Motor & Fan
- Brackets, Flanges & Hangers
- Condenser, Compressor & Lines
- Controls
- Evaporator & Heater Components
- Filters
- Gaskets & Sealing Systems
- Hardware, Fasteners & Fittings
- Heater
- Hoses & Pipes
- HVAC Case
- Motors, Core, Case & Related Components
- Relays
- Sensors
- Switches & Sensors
- Switches, Solenoids & Actuators
- Temperature Controls & Related Components
- Wire, Cable & Related Components
- Bearings
- Brackets, Flanges & Hangers
- Bushings
- Gaskets & Sealing Systems
- Hardware, Fasteners & Fittings
- Housing & Components
- Motors
- P/S Pump & Hoses
- Power Steering Hoses, Pumps, & Related Components
- Pump & Hoses
- Shroud, Switches & Levers
- Steering Column
- Steering Column Assembly
- Steering Gear & Linkage
- Steering Wheel
- Steering Wheel & Trim
- Steering, Gear & Related Components
- Switches, Solenoids & Actuators
- Wire, Cable & Related Components
- Alignment
- Axle & Differential
- Brackets, Flanges & Hangers
- Bushings
- Carrier & Front Axles
- Control Modules
- Covers & Trim
- Front Suspension
- Hardware, Fasteners & Fittings
- Rear Suspension
- Ride Control
- Sensors
- Shocks & Struts
- Stabilizer Bar & Components
- Suspension Components
- Suspension, Springs & Related Components
- Switches, Solenoids & Actuators
- Upper Control Arm
- Wheels
Valve Train Components for 2006 Chevrolet Corvette
Related Parts
Part # / Description / Price
Valve Locks 
GM
MSRP $7.62
GM Engine Valve Spring Retainer Keeper
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
Valve Rocker Arm GM
MSRP $24.39
GM Engine Rocker Arm
Silverado, sierra. Exhaust. Suburban 3500hd. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
LS-Series Steel Pushrod GM
MSRP $31.67
GM Engine Push Rod
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
Engine Camshaft GM
MSRP $462.69
GM CTS-v. All models. SSR. GTO. Corvette. 6.0l. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
Timing Chain Damper Kit with Bolt, Retainer, and Spacer GM
MSRP $66.63
GM Engine Timing Chain Guide
SSR. GTO. This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors
Exhaust Valve GM
MSRP $51.01
GM Engine Exhaust Valve
This GM Genuine Part is designed, engineered, and tested to rigorous standards and is backed by General Motors .
Engine Hydraulic Valve Adjuster/Valve Lifter GM
MSRP $56.97
GM Engine Camshaft Follower
Adjusts the valves on your vehicle's engine for proper performance