Glossary “two valve” Definition:
Two valves. One intake and one exhaust, per cylinder.

Glossary “two way catalyst” Definition:
Catalytic converter that oxidizes hydrocarbons and carbon monoxide, but has little effect on oxides of nitrogen.

Glossary “two stage paints” Definition:
Consists of two distinct layers of paint: basecoat and clearcoat.

Glossary “two stroke cycle” Definition:
An engine in which the four events, intake, compression, combustion, and exhaust, take place in two stokes of the piston.

Glossary “two plane manifold” Definition:
An intake manifold with two plenums.

Glossary “two sided plastic weld” Definition:
The strongest type of weld, because you weld both sides of the part.

Glossary “two speed axle assembly” Definition:
Heavy-duty, vehicle axle arrangement having two different output ratios from the differential that are controlled from the cab of the truck.

Glossary “two part adhesive systems” Definition:
An adhesive that consists of a base resin and a hardener (catalyst). When mixed together they form an acceptable alternative to welding for many plastic repairs.

Glossary “two part putty” Definition:
Spot putty that comes with its own hardener for rapid curing.

Glossary “two piece drive shaft” Definition:
Type of drive shaft having two sections requiring a center support bearing mounted on the vehicle frame and universal joints at both ends and in the center.

Glossary “two piece piston” Definition:
Piston having a removable skirt.

Glossary “two piece valve” Definition:
Valve having a head and stem made of two different materials.

Glossary “two cycle” Definition:
Term used for two stroke cycle.

Glossary “two disc clutch” Definition:
A clutch with friction discs for additional holding power used in heavy duty equipment.

Glossary “two bolt main” Definition:
Engine block in which the mains are held in place with two bolts each.