Piers Diesel offers a full host of components for the Cummins, including hard-to-find upgrades like performance camshafts and ported heads. If you really want to go all-out, the company offers a twin-turbo system for both 12-valve and 24-valve Cummins models.
Diesel Power Products
Diesel Power Products is famous for its TAG or Turbo Air Guide. By straigtening and smoothing the airflow into the turbo, the company claims increases in power, efficiency, and quieter operation. DPP also offers Scotty Air Systems cold-air intakes for Cummins, including a super-cool clear model.
Superchips offers its Max Microtuner for 1998-2002 24-valve Cummins, offering three levels of tuning, and diagnostic trouble code reading capability.
TST Products has released a new PowerMaxCR add-on computer for the common-rail Cummins. The PowerMaxCR changes injection timing and duration to achieve power and economy gains. This new unit has on-the-fly power adjustment features that allow nine power settings in 20+ horsepower steps to 200 extra horsepower at 2,900 rpm and nine torque settings in 60+ lb-ft steps to 600 lb-ft extra torque at 1,700 rpm. The PowerMaxCR is available with or without built-in gauges that monitor boost and automatically control exhaust gas temperature.
The Walker AIRSEP is a closed crankcase system that makes your engine literally cleaner. The system eliminates oily crankcase breather discharge, returning it to the engine's oiling system. The company also claims the product lowers the amount of crankcase pressure building in the engine, putting less pressure on engine seals, and reducing the chance of oil seal leaks.