In a car the clutch is operated by the left-most pedal using hydraulics or a cable connection from the pedal to the clutch mechanism. Even though the clutch may physically be located very close to the pedal, such remote means of actuation are necessary to eliminate the effect of slight engine movement, engine mountings being flexible by design. more from Wikipedia

In a car's clutch, a flywheel connects to the engine, and a clutch plate connects to the transmission. You can see what this looks like in the figure below. more from how stuff works

20/20 Vision, Great Wenham, Colchester
An extensive and competitively priced range of billet steel reduced-inertia flywheels Can there be a more cost effective performance modification? Aluminium pulleys, competition valve guides, brake disc bells and caliper mounts, developed with the help of constructors and engine builders.

ACT
Advanced Clutch Technology, INC. (ACT) is a premier performance clutch kit manufacturer with more than 300 different applications and 500 performance clutch kits. The company's product line features clutches and forged flywheels for the most popular vehicles in the sport compact, domestic and diesel truck market. ACT's performance clutches and flywheels are used for street or race, including, but not limited to drag, drift, road and rally racing.

Selecting a clutch to provide the performance, quality and feel a driver demands can be challenging in today’s market. There are lots of performance clutch kit options, friction materials and advertising claims to choose from. ACT has been in the Sport Compact Industry for over 10 years. ACT products are designed to compliment a vehicles’ drive train system and engine’s modifications.

Center Force
Centerforce® is proud to be recognized as the leading manufacturer of performance clutch systems in the United States. The Centerforce era started in the early 1980’s when Bill Hays, founder of Hays Clutches in the 1950’s, created the technologies behind Centerforce. Clutches bearing his name are found on thousands of high performance vehicles around the world. With the desire to engineer a solution to the ‘sticking over-center problem’ of diaphragm clutches, Bill Hays designed and patented the Centerforce Weighted Clutch System. His new design increased pressure plate clamping force while maintaining easy pedal effort and would not allow the diaphragms tendency to ‘stick over-center’.

Clutch Masters
Today, thanks to Clutch Masters, increased holding pressure does not necessarily mean increased pedal pressure and the problems that can accompany it. By re-engineering the leverage or fulcrum point on the pressure plate through their Hi-Leverage^tm ttechnique, Clutch Masters has increased clamping power, often without changing pedal pressure.

Excessively increased pedal pressure, as found in many of today's traditional high performance clutches, places an unsafe amount of pressure on the delicate crankshaft thrust bearing found in most of today's sport compact automobiles. Placing undue stress on the thrust bearing typically causes the bearing to wear prematurely or fail altogether. This failure can lead to catastrophic internal engine damage.

A clutch, simply put, is a friction device that disengages and engages the engine from the transmission to allow for transition from motionless to movement and for gear changes. For street applications a smooth transition of power is essential while still being able to transfer all the power of the engine to the transmission. As power output of engines increase and demands on clutches become greater - for example high performance street or racing cars - the holding and clamping capacity of a clutch also must increase. This is where Clutch Masters' innovative engineering comes into play.

Exedy UK
More than 50 years ago EXEDY founder Kazuma Adachi decided to devote himself to Japan's fledgling automobile industry and began earnestly working on developing a better clutch. Eventually his efforts bore fruit in the form of clutch discs which would prevent the transfer of noise and vibration from drivetrain equipment.

Those clutch discs came to be used by the world's most prominent automakers, establishing the foundation of the present company.

Fidanza
WHY DO YOU OFFER BOTH STEEL AND ALUMINUM FLYWHEELS? – Our steel flywheels are designed to be some the strongest flywheels on the market. They are designed to be used where extreme strength is the issue and not increased performance. Some examples of this would be in rock crawling vehicles and sand rails. Our aluminum flywheels are also very strong and will give a tremendous boost in performance without affecting driveability.

Helix Autosport ltd, Banbury, Oxon, UK
Helix Autosport has been manufacturing the most extensive range of high quality performance and motorsport clutch kits for 14 years, enabling its customers to enjoy success in all categories from Sebring 12hrs, London-Sydney Rally 2000, Paris-Dakar Rally 1999-2006, French Rallycross Championship, FIA European GT Championship, British Off Road Championship production class 2004-2005 and the Peugeot ReCup Series-France. It is now producing specialised and bespoke clutch and flywheel systems for a variety of vehicles, with others under development. Helix produce a range from 140mm to 275mm diameter in organic sintered and cerametallic formats.

Quarter Master Ind, USA
Quarter Master Ind design, manufactures and sells racing performance clutch kits and driveline components for all types of racing applications from top NASCAR teams to the weekend warrior It is known for Its excellent customer service and technical support as well as its make to order capabilities

RPS
Turboclutch Sport Series clutches offer unmatched value. These clutches are packed with features found in other higher priced units, yet sell for much less. Sport pressure plates have 150 to 200 pounds of extra clamping force to hold the power of your mild upgrades.

Spec Clutch
Spec Clutch make a simply massive range of clutches for a huge variety of cars, more than likely you'll find what you want, no metter how much power you have

Spec Stage 3 Clutch - For all modified engines making more torque than the stage 2 can support. Maintains stage 2 feel for good daily drivability and offers very good wear characteristics, but provides a higher torque capacity. High clamp pressure plate, composite multi-friction carbon-kevlar material, high torque sprung hub and disc assembly, bearing and tool kit.

Tilton Engineering, USA
Tilton Engineering is a leading manufacturer of driveline components, in-cockpit brake controls and starters for racing and high-performance applications. Driveline products include clutches (metallic and carbon), flywheels, bellhousings, concentric slave cylinders and complete driveline packages. Tilton Brake and Controls (TB&C), a division of Tilton Engineering, offers a wide range of pedal boxes, master cylinders and related brake controls

ZF Sachs Race Engineering GmbH, Germany
ZF Sachs Race Engineering, a subsidiary of the drivetrain and chassis component manufacturer ZF Sachs AG, established as a legally Independent business in 1998 ZF Sachs Race Engineering develops, designs, produces and sells dampers and clutches for use In the following three categories: Sachs Formula - High end Motor Sport  Sachs Racing - Motor Sport Matrix  Systems, Sachs Performance - Tuning  products for the road. The company's three product lines reflect its most important target markets and realise its goal of consistently redefining the technological limits