Dan Press Industries [DPI]
http://www.dpiracingproducts.com/
Brake system components

Dart Machinery [DRT]
http://www.dartheads.com/
Cylinder heads, engine blocks, intake manifolds

Dedenbear [DED]
http://www.dedenbear.com/
Delay boxes, throttle stops, transmission cases and accessories

Dee Zee [DZZ]
http://www.deezee.com/
Running boards, side rails, tailgate protectors and accessories

Defender Race Bodies [DRB]
http://www.defenderracingbodies.com/
Circle track roofs and windows

Deist Safety [DEI]
http://www.deist.com/
Parachutes and accessories

Del West USA [DWU]
http://www.delwestusa.com/
Lightweight Titanium Valve Train Components

Demon Carburetors [DEM]
http://www.barrygrant.com/
Carburetors and accessories

Denso [DEN]
http://www.iridiumpower.com/
Performance Spark Plugs

Derale [DER]
http://www.derale.com/
Cooling components

Design Engineering Inc. [DSN]
http://www.designengineering.com/
Thermal protective materials

Detroit Locker [DET]
http://www.eaton.com/
Traction control differentials

Detroit Speed & Engineering [DSE ]
http://www.detroitspeed.com/
Camaro, Firebird, & Nova chassis components

Deuce Factory [DEU]
http://www.deucefactory.com/
Stainless steel rod ends, bolt kits, four bar kits

DiabloSport [DBL]
http://www.diablosport.com/
Performance tuning modules and related components

Diamond Racing Pistons [DIA]
http://www.diamondracing.net/
Racing pistons

Dick Cepek [MIC]
http://www.dickcepek.com/
On and off road performance tires and wheels

Diversified Machine Inc. [DMI]
http://www.diversifiedmachineinc.com/
Sprint Race Components

Dominator Race Products [DOM]
http://www.aerotechstyling.com/
Dirt Late Model noses and related components

Doug's Headers [DGH ]
www.dougsheaders.com/
Headers and accessories

Dupli-Color [SHE]
http://www.duplicolor.com/
Paints, primers and related coating products

Dura-Bond [DUR]
data.melling.com/Engine/durabond.php
Camshaft bearings

Dura-Lite [DRL]
http://www.duralitewheels.com/
Racing Wheels

Dyer's Rods [DYR]
http://www.dyersrods.com/
Performance connecting rods

Dynamat [DMT]
http://www.dynamat.com/
Thermo-acoustic control material

Dynatech [DTH]
http://www.dynatechheaders.com/
Headers and exhaust components

Dynomax [DYN]
http://www.dynomax.com/
Exhaust products