Are you experiencing fuel-pressure loss with your Cummins diesel engine due to a faulty Bosch P7100 injection pump? Tork Teknology offers an adjustable overflow valve with a custom spring; a revised seat design to make startups more responsive; and redesigned Cummins return valve to eliminate failed seats. This new setup takes just minutes to install, is easy to adjust, and results in 53-percent-higher fuel pressure at idle. Retail price: $45.