E3 Spark Plugs [E3P]
http://www.e3sparkplugs.com/
Performance spark plugs

Eagle [EAG]
http://www.eaglerod.com/
Performance connecting rods and cranks

Earl's [EAR]
www.holley.com/index.asp?division=Earls
Performance hose and fittings

EasyStreet [ESY]
http://www.easystreetair.com/
Air suspension systems

Eaton Posi [DET]
http://www.eaton.com/
Traction control differentials

Edelbrock [EDE]
http://www.edelbrock.com/
Peformance manifolds, engine components and suspension pieces

Edge Products [EDG]
http://www.edgeproducts.com/
Performance Diesel Computer Modules

Eibach Springs [EIB]
http://www.eibach.com/
Springs and suspension kits

Electric-Life [ELE 
http://www.electric-life.com/
Power windows, keyless entry kits, door locks and related components

Elgin Industries [ELG]
http://www.elginind.com/
Valve train components

]Enderle [END]
No web site listed
Fuel injection systems and components

Energy Suspension [ENE]
http://www.energysuspension.com/
Urethane suspension components

EngineQuest [ENQ]
http://www.enginequest.com/