K&N Filters [KNE]
http://www.knfilters.com/
Reusable performance air filters, air injection kits

K-Motion [KMO]
www.kmotion.biz/springsintro.htm
Valve springs, locks and retainers

K1 Technology [K1T]
http://www.k1technologies.com/
High performance connecting rods and crankshafts

KB Carburetors [KBC]
No web site listed
Racing Carburetors and related components

KC Hi-Lites [KCH]
http://www.kchilites.com/
Fog, driving and competition lights

Keith Black Pistons [KBP]
http://www.kb-silvolite.com/
Performance pistons

Kendall Oil [KEN]
http://www.conocophillipslubricants.com/
High performance oil and lubricants

Kinetik Battery [KTK]
http://www.kinetikpower.com/
High performance power cell batteries

King Bearings [KEB]
http://www.kingbearings.com/
Engine bearings

Kinsler [KIN]
http://www.kinsler.com/
Fuel injection components

Kirkey [KIR]
http://www.kirkeyracing.com/
Drag and circle track aluminum seats

Kluhsman Racing Components [KLU]
http://www.krcracing.com/
Oval track racing components

Koni [KON]
http://www.koni.com/
Performance shocks

Kool Mat [KOO]
http://www.koolmat.com/
Heat barrier

KSE Racing Products [KSE]
http://www.kse-racing.com/
Power steering pumps and sprint car products

Kwik Change Products [KCP]
No web site listed
Tire pressure relief valves and accessories

KYB Shocks [KYB]
http://www.kyb.com/
Shocks and struts