Product lines: 
Aviaid Oil systems
Cen-pe-co Lubricants
Crower -  clutches, rods, etc.
Darton Sleeves
MSD Ignition
RPM Data Aquisition
Precision Turbo- turbochargers, etc...
Humpco - chassis, differential, and driveline components
GMS Products:
Forged pistons from 3.990 to 5.500
Guillotine Air Shut offs
Aluminum and Steel connecting rods
Aluminum and Steel engine girdles
Small Block JD transmissions
JD straight tooth timing gears
Pump drive assemblies
billet camshafts
billet crankshafts
taper lock hubs and balancers
distributer drives
water injection systems
complete alcohol fuel systems
roller lifters for adaptable for all brands
custom chromoly pushrods
IH external oil kits, (requires removal of stock pump cover)

Now Available!!!
forged pistons for Duramax, Powerstroke, and Cummins
Crower Rods for Duramax and Powerstroke
Crower Billet Crankshafts for Duramax
Counterwieghted crankshafts for Cummins
Camshaft regrinding
Various Billet Products for Cummins from Keating Machine

HUMPCO Products:
*NEW* - Billet Aluminum Differential Housing and Reverser
- Billet  Carriers- Steel or Aluminum
- Complete Chassis for TWD, Mod, Prostock, Superstock
*Click on photos to see larger image*
Specializing in 5.9 Cummins parts for pulling and racing:
- Billet freeze plugs
- Aluminum front covers
- Billet Aluminum front drive housings